Bücher veröffentlicht von Chemical Publishing Co Inc.,U.S.

CONTENTS - 1. AEROSOLS - 2. BACTERICIDES-FUNGICIDES - SANITIZERS - 3. CLEANERS FOR HOUSEHOLD AND INDUSTRY - 4. CARE OF FLOORS - 5. LAUNDERING AND DRY CLEANING - 6. TREATMENT OF METALS - 7. PESTICIDES - 8. MISCELLANEOUS - BIBLIOGRAPHY - APPENDIX - Glossary - Suppliers of Materials and Equipment - Useful Tables - Patents - Periodicals of Interest - Associations Related to the Industry - INDEX -

CONTENTS - INTRODUCTION - 1. BASIC CONSIDERATIONS - Solutions-Suspensions-Emulsions-Surface Activity - 2. PROPERTIES OF EMULSIONS - Particle size and arrangement ; Rheology ; Micelle Theory ; Stability and Interfacial Phenomena ; Causes of Unstable Emulsions - 3. INGREDIENTS AND ADDITIVES - Surfactants-Emulsifying Agents ; Wetting Agents ; Foamers ; Protective Colloids ; Preservatives - 4. ANALYSIS AND TESTING OF EMULSIONS - Type of Emulsion ; Density ; Viscosity ; Surface Tension ; Particle Size ; Water ; PH-Color OdorCorrosion ; Stability ; Performance ; Analytical Procedures ; ASTM Specifications - 5. TECHNIQUES OF EMULSIFICATION - English Method-Continental Method - 6. EMULSIFYING EQUIPMENT - Low-Shear-High-Shear-Rotor-Stator ; Pressurized Fluid ; Vibrational Devices ; Laboratory Equipment - 7. EMULSION PLANTS AND PRODUCTION MACHINERY - Over-all Plan ; Modes of Operation ; Power Requirements ; Mixing Tanks ; Pumps ; Conveyors ; Materials of Construction ; Instrumentation ; Packaging - 8. SELECTED TOPICS - Formulation of Emulsions-HLB-Biodegradability - Regulations - BIBLIOGRAPHY - LIST OF EMULSIFYING AGENTS - SUPPLIERS OF EMULSIFYING AGENTS - GLOSSARY - INDEX - Introduction - Emulsions, though not new, are finding new and wider applications daily. One of the first references to emulsions was recorded by Galen (131-c.201), the Greek physician. Beginning with that early reference to the emulsifying power of beeswax, the art and science of emulsification has flourished. Emulsions are prepared and used for a variety of reasons. As oil paint cannot be applied to a damp surface, it is emulsified in water. The oil paint, then, in the form of an emulsion, can be applied to a damp surface. Therefore, the emulsion can change the application characteristics of a material. Water is a desirable, cheap diluent, and an emulsion is an easy method of using water to dilute materials that are not soluble in water. In addition, the fire hazard of flammable water-insoluble materials can be decreased through emulsification. The odor and taste of water-insoluble materials can be reduced by the use of an emulsion. Cod-liver oil, for example, loses much of its fishy, oily taste when it is emulsified. The kinetics of many reactions are enhanced through the use of emulsion polymerization techniques. On the other hand, emulsions are difficult to manufacture. A small deviation in temperature or mixing speed or small amounts of impurities can prevent the formation of a stable emulsion. Emulsions are sensitive in varying degrees to heat, cold, and age. The production of good, stable emulsions, therefore, is the combination of science and art. It is the purpose of this book to describe the art and technique of emulsification.

CONTENTS - 1. AGRICULTURAL EMULSIONS - 2. BITUMINOUS EMULSIONS - 3. CLEANERS - 4. COSMETICS - 5. EMULSION POLYMERIZATION - 6. FOAMS AND ANTIFOAMS - 7. GASOLINE EMULSIONS - 8. FOOD EMULSIONS - 9. LEATHER AND PAPER TREATMENT EMULSIONS - 10. MEDICAL EMULSIONS - 11. CUTTING OILS, SOLUBLE OILS, MISCIBLE OILS - 12. PAINT - 13. POLISHES - 14. RESIN AND RUBBER EMULSIONS - 15. TEXTILE EMULSIONS - APPENDIX - Conversion Tables - Viscosity Comparison Chart - Color Standards Comparator - Temperature Conversion Table - Rate of Flow Chart - List of Emulsifying Agents - Suppliers of Emulsifying Agents - INDEX - FOREWARD - The first volume of Practical Emulsions has attempted to convey a general impression of the science of the formulation and manufacture of emulsions. Salient points have been presented in as simple a manner as possible, while detailed examination of specific points of the theory has been left to those whose qualifications and interests better fit them for such tasks. In this volume, I have compiled basic formulations of many types of emulsion. This compilation is intended to provide graphic illustration of the breadth of emulsion technology. The formulations can also provide a starting point for the development of new and improved emulsion products and represent the types of product that can be made and their major constituents. These formulations are provided by manufacturers to illustrate the use of their products. The suitability of any product for marketing, or the determination of the patent position regarding any formulation, is the responsibility of the person who manufactures and/or sells the product. Many firms have generously provided formulation suggestions, and they merit my sincere appreciation for their help. Their contributions are acknowledged by appropriate references at the end of each chapter.

CONTENTS - 1. INTRODUCTION - 2. ANIMAL FATS AND OILS - 3. VEGETABLE FATS AND OILS - 4. FATTY ACIDS-FATTY ALCOHOLS-GLYCEROL - 5. SURFACTANTS AND SURFACE ACTIVITY - 6. PRODUCTION OF FATS AND OILS - 7. SOAP MANUFACTURE - 8. SYNTHETIC DETERGENTS - 9. ANALYSIS OF OILS AND DETERGENTS - INDEX - Preface - Presented in this book are quantities of data, gathered during many years in my practice of chemistry, either as resident chemist in manufacturing plants, or as a consultant to the soap and related industries. The style is didactic and such that it may readily be understood by non-technical personnel. Involved theoretical and technical discussions have been avoided. As far as possible, references have been included at the end of each chapter. Although much of the information contained in this work is well within my own experience, much of it has been gleaned also from manufacturers' technical bulletins or through private correspondence. Many patents have been cited, merely as examples of products discussed; this is not to be construed as recommending the infringement of any such patents. The various formulations are presented in good faith, but no warranty is given, nor is freedom from any patent to be inferred. With a little ingenuity on the part of the reader, many useful and efficient products may be made along the lines discussed, without in any way infringing on patented products. Because of numerous factors affecting results, all the formulations cited herein, although believed to be reliable (most of them having emanated from the greatest laboratories in the world) should be tested thoroughly. It is especially recommended that manufacturers make their own tests to determine the suitability of the formulations, for the specific applications intended. I am indebted to the manufacturers of the many chemicals named in the book, for information which I gathered either from direct correspondence or from their technical bulletins; also for their many samples with which I compounded some of the formulas. Special mention should be made of those companies that supplied photographs of equipment and installations depicting various processes. I have tried to include all information pertinent to each formula, and credit has been given to all identified suppliers, so that additional information, if needed, may be obtained from the manufacturers of the basic materials used. Finally, I am grateful to the publishers for valuable assistance in the organization and presentation of my quantities of material which now comes out as not merely a second edition of my Oil, Fat, and Soap, but as a much more comprehensive new book.

CONTENTS - I-Machine Technology - A-Machine Elements - B-Gearing - C-Mechanical Transmissions - D-Mechanisms and Kinematics - E-Fastening and Fasteners - II-Magnetics and Electronics - A-Magnetics - B-Electricity - C-Electrical Devices - D-Electronic Devices - E-Computer Technology - III-Light and Optics - A-Light Sources - B-Lenses, Prisms and Mirrors - C-Cameras and Projectors - D-Optical Instruments - IV -Fluid Technology - A-Hydraulic Elements - B-Pumps - C-Valves - D-Hydraulic Components - E-Hydraulic Systems - V -Industrial Processes - A-Tools - B-Machinery - C-Fabrication Methods - VI-Power Generation - A-Engines - B-Turbines - C-Rockets and Jets - D-Electric Power - VII-Structural Engineering - A-Structures - B-Cranes, Derricks and Elevators - VIII-Comfort Heating and Cooling - A-Refrigeration - B-Air Conditioning - C-Steam Heating - D-Heating Systems - IX-Transducers - A-Displacement Types - B-Pressure Transducers - C-Temperature - D-Force and Torque - E-Velocity and Acceleration - X-Metrology - A-Dimensional Measurement - B-Volume, Weights and Area - C-Pressure and Weight - D-Torque and Temperature - E-Velocity - F-Angles - G-Miscellaneous Measuring Instruments and Techniques - H-Time - Index -

CONTENTS - Preface - I. History and Theory of Spectroscopy - 1. Historical Review - 2. The Atom in Spectroscopy - II. Light Sources - 1. The Electric Arc - 2. The Spark - III. Spectroscopes - 1. Optical Systems - 2. Industrial Spectrographs - 3. Spectroscope Construction - IV. Spectroscopic Analysis - 1. Qualitative Analysis - 2. Determinations - 3. Quantitative Analysis - V. The Spectroscope in Mineralogy - 1. Tests Used in Mineral Identification - 2. Application of the Spectroscope in Mineral Classification - VI. Characteristic Lines of the Elements - VII. Wave-Length Table-Chart - Appendix - Conversion Table - Bibliography - Firms Selling Spectrographic Materials - Index - PREFACE - Too many chemists, mineral collectors, prospectors, and even ass ayers struggle with tedious chemical and uncertain Hame and blowpipe tests when a spectroscope would give far more prompt results. With electricity universally available, and with present day instruments and parts so low in cost, spectroscopic equipment should be in every school and laboratory. This book has been written to assist those who wish to analyze ores, minerals, alloys, and inorganic chemicals, or wish to teach others to do so. In the qualitative analysis of such materials, there is no instrument so rapid and accurate as the spectroscope, although the analyst must remain within its limits of operation. This is also true of the quantitative analysis of these materials. Although speed comes only after some experience, one may very soon acquire the necessary technique for accurate determinations. The author has attempted to point out some of the short cuts to quick spectroscopic success. Direct methods of burning samples are shown; the key lines of each element have been selected, and a new chart-table has been prepared which shows both the spacing of spectral lines and their wave-lengths. An increasing number of schools and universities have courses in spectroscopy, and many industrial plants use spectrographic equipment to speed up the solution of their special problems of analysis. The bulk and cost of spectroscopes tend to increase in geometric ratio with efficiency, and thus the price of a commercially built high-dispersion instrument is usually beyond the reach of the individual analyst. The parts necessary to make a powerful instrument are few and the essential construction is very simple. The writer believes that instructions for making effective instruments at costs so low as to be within the reach of all, will be appreciated. One section of the book has, therefore, been devoted to such instructions. Largely from his own experience, but also from the literature (see bibliography) a considerable amount of material has been arranged in what is hoped will be helpful form.

Contents - PART 1 - The Unique Position of the Carbon Atom in Chemistry - 1. The Nature of Organic Chemistry - 2. The Organic Chemist Looks at a Molecule - 3. Valence - 4. New Ideas on Valence - 5. The Unique Position of Carbon among the Elements - 6. The O C T E T in Chemistry - 7. The D U E T in Chemistry - 8. North and South Poles - PART 2 - The Architecture of Carbon Compounds - 9. Methane and the Structure Theory - 10. Carbon Chains - 11. Carbon Rings - 12. Morphology of Chain and Ring Compounds - 13. Double and Triple Bonds - 14. Energy and Molecular Structure - 15. PI Electrons - 16. Bond Energies and Resonance - 17. How Molecules React - 18. Why Molecules React - 19. The Benzene Ring - 20. Nuclear Reactions - 21. The Geography of the Benzene Ring - 22. Stereochemistry and Isomerism - PART 3 - The Classification of Carbon Compounds - 23. The Common Methods of Classification in Organic Chemistry - 24. Halogen Compounds and Free Radicals - 25. Alcohols, Phenols, and Ethers - 26. Aldehydes and Ketones - 27. Carboxylic Acids - 28. Mixed Oxygen Compounds - 29. Nitrogen Compounds - 30. Compounds with Sulphur, Phosphorus, and Other Elements - PART 4 - Special Topics in Organic Chemistry - 31. Structures of Complex Compounds - 32. Aromatic Character in Heterocycles and Condensed Cycles - 33. Proteins - 34. Carbohydrates - 35. Chemistry in Plant and Animal Life - 36. Dyes - 37. Isotopic Chemistry - 38. Giant Molecules - Supplementary Reading - Index -

Preface - This single-volume compendium fulfills the demand for a compact version of the widely acclaimed Encyclopedia of Surfactants and contains over 12,000 entries. The surfactant products included have been compiled with. the cooperation of the major national and international surfactant manufacturers. The first section of this reference is a Trademark Dictionary that contains short entries for all tradename surfactants that appear in Volumes I-IV of the Encyclopedia plus all the new surfactant products that have become available since the publication of this set. Each tradename entry is followed by a number in brackets which refers to the manufacturer that is listed in Part III of this encyclopedia. What makes this reference unique and especially useful for anyone doing chemical research is the addition of the Chemical Component-to-Tradename Cross Reference section. This provides the user with the capability of finding tradename surfactant products that contain specific chemical compounds. For example, by locating alphabetically the chemical ammonium lauryl sulfate, the user is able to retrieve a list of all the tradename products that contain that chemical. The user can then refer back to the frrst section for detailed descriptions of the specific tradename products listed here. This section also includes the chemical compound synonyms for the surfactant components which are cross referenced in most cases to the alternate chemical names that contain the tradename product listings. Primary chemical component references are made to the CTFA (Cosmetic, Toiletry, and Fragrance Association) adopted names where possible. For many chemical entries the Chemical Abstract Service Registry Numbers (CAS) are given. This number ensures the unique identification of a chemical regardless of its multiplicity of synonyms. RD (Recognized Disclosure) reference numbers are included in some cases either in addition to the CAS number or because no CAS number has been assigned as yet. The third section presents the names and addresses of the manufacturers of all of the products included in this compendium with their associated tradenames.

Partial Table of Contents I. The Thermal Separation of Liquids II. Thermodynamics of Mixtures 1. Definitions and Relationships A. Separability of a Liquid Mixture B. Partial Pressures in Vapor Mixtures C. Evaporation of Liquid Mixtures 2. Types of Mixtures A. Ideal Binary Mixtures B. Nonideal Binary Mixtures C. Ideal Multicomponent Mixtures D. Nonideal Multicomponent Mixtures III. Continuous Rectifiers 1. Mode of Operations 2. Operating Lines A. Enrichment Line B. The Stripping Line 3. Stepwise Separation in Rectifiers A. Theoretical Plates for Separation of Binaries B. The Reflux Ratio in the Separation of Binaries C. Multicomponent Mixtures 4. Column Diameter and Column Throughput 5. Heat Requirements IV. The Batch Still 1. Operation 2. Operating Line and Separation Steps 3. Column Diameter, Column Throughput, and Heat Requirements 4. Time for Separation and Related Variables at Constant Product Concentration A. Molar Vapor Load Constant in Time B. Heat Requirement Constant in Time 5. Separation Time for Variable Heating Area V. The Semicontinuous Still 1. Operation 2. Finding the Operating Lines, the Separation Steps, the Column Load, the Column: Size, and the Heat Demand VI. Engineering Data, Optimization of Costs, and Selection of Column Internals 1. General A. Packing Types B. Plates and Trays 2. Designs and Functions A. Packed Towers B. Plate Columns 3. Evaluation of Rectifying Columns and Best Mode of Operation A. Evaluating and Calculations, Separating Effect, Pressure Loss, Load, Specific Column Volume, and Specific Column Cost B. Numerical Evaluation for Packed Towers C. Quantitative Evaluation for Plate-Type Columns D. Packed Columns versus Tray Columns-Operational Features and Cost E. Special Designs for Vacuum Operation 4. Tests of Full-Size Tower Internals VII. Optimum Separation 1. Optimization of Simple Columns A. The Theory and Its Application B. Quantitative Evaluation 2. Optimization of Multiple Columns A. Duplex Columns: Number of Theoretical Steps, Reflux Ratios, and Vapor Loads B. Vapor Loads of Multiple Columns Subdivided Because of Limited Height C. Optimizing Duplex Rectifiers for Minimum Pressure Loss 3. Optimum Operation of Combined Columns of Different Types Under Special Consideration A. Parallel Arrangement B. Series Arrangement 4. Specialized Operations A. Specialized Hookups and their Calculation B. Rectification in Straight Stripping Columns C. Rectification in Straight Enriching Columns D. Direct Heating of Columns E. Saving Heat in Rectification VIII. Detail Planning of Separating Columns 1. General Viewpoints in the Selection of Column Types 2. Packed Columns F. Maximum Loads for Metallic; Pall-Ring and Raschig Ring Columns 3. Special Packings 4. Plate-Type Columns 5. Pressure Losses in Rectification Columns IX. Partial Distillation 1. Separation of Liquids by Continuous Partial Distillation 2. Separation of Liquids by Dis

Contents - Introduction - Substitute Requirements - Miscellaneous - List of Substitutes and Alternatives - Appendix - Preface - Historically, this book was started about 40 years ago. At that time, the cosmetic, drug and flavor industries were seeking substitutes for glycerin and ethyl alcohol-for economic reasons and to avoid the red tape connected with the buying, storage, use, and selling of alcohol and alcoholic products. Fair substitutes were developed for both of these products, but when the price of glycerin was stabilized at a reasonable figure, these substitutes were almost completely forgotten. Over a period of years, this writer has developed substitutes or alternatives for numerous products in diverse industrial fields. Thus, a file of such materials has been built up. To this has been added the suggestions of others and references from scientific and technical journals and texts. This book cannot be regarded as complete or encyclopediac. The subject matter is in a state of flux and is growing and changing continuously. It should be useful to many as a starting point. It should not be expected to give the final answer to a highly specialized need. It is the task of the specialist or expert to glean from it what may be applicable and to interpret, interpolate, or "imagineer" a solution to his specific problem. Condensation, rather than elaboration, has been the precept in assembling this information, in order to expedite the publication of this book. It is the concentrated essence of many years of experience of many chemists, engineers, and other technical workers.

Contents - 1. SOLIDS-STORAGE AND HANDLING - General - Conveyors - Drying - 2. LIQUIDS-STORAGE AND HANDLING - Tanks - Pumps - Mechanical Seals - 3. GASES-STORAGE AND HANDLING - General - Handling Air - Types of Apparatus - 4. PIPE, FITTINGS, VALVES - Pipe Types- Valve Types - 5. MIXING OF MATERIALS - Blending of Solids - Mixing of Fluids - Operating Notes - 6. HEATING AND COOLING - General - Heat Exchangers - Suggestions for Operation - 7. SEPARATION OF MATERIALS - Solids from Solids - Solids from Liquids - Liquids from Liquids - Gases from Gases - 8. UTILITIES - Heating Systems - Cooling Systems - Refrigeration - Process Water - Electrical Systems - Air Systems - 9. INSTRUMENTS FOR PRESSURE - General - Indicators - Transmitters - Regulators - 10. INSTRUMENTS FOR TEMPERATURE - Primary Elements - Transmitters - Regulators - 11. INSTRUMENTS FOR FLOW AND LIQUID LEVEL - Indicators - Flow Transmitters - Liquid Level Indicators and Transmitters - 12. INSTRUMENTS FOR CONTROL - Recorders and Integrators - Controllers - Operating Pointers - Control Valves - Miscellaneous -

This handbook provides extremely useful data and information about theory and industrial applications that formerly were limited to applications in military ordnance, fireworks, and rock blasting.These "civilian" applications include spacecraft, aircraft, underwater vehicle systems, metal forming, cladding, riveting and some other production methods. Also pairs well with: Fireworks, Principles and Practice, 4th Edition, ISBN: 0820604070; Military and Civilian Pyrotechnics, ISBN: 0820603643; Pyrotechnics, ISBN: 0820601128. Visit us at www.chemical-publishing.com

This comprehensive book is the only one that addresses theory, practice, management, purchasing and marketing of cooling water systems in one volume. The approach of this essential reference is practical and international, and it is based on 30 years of professional experience

Accurate chemical water treatment and skillful maintenance are key elements to attain optimal boiler operation. Boiler Water Treatment: Principles and Practice analyzes the fundamentals of the mechanical operation of boilers, together with the applied chemistry required to achieve waterside cleanliness and costeffective and optimal boiler operation.

Although many papers have been published describing methods for the inorganic analysis of petroleum no book has previously appeared devoted exclusively to this subject. The purpose of this work is to provide a laboratory handbook for industrial analysts of various degrees of professional training covering the determination of those elements commonly occurring in various types of petroleum products.The procedures represent, from the author's point of view, a reasonable compromise among the usual conflicting interests of speed, accuracy, and cost, and emphasize manufacturing rather than research applications. CONTENTS: Introduction 1. The Inorganic Components of Petroleum 2. Preparation of Samples for Inorganic Analysis: Direct Ashing, Soft Ashing and Wet Oxidation, Direct Wet Oxidation, Fusion with Pyrosulfate, The Oxygen Bomb, The Peroxide Bomb, Sodium Dehalogenation, Extraction Methods, Combustion Methods, Alkaline Sulfide Treatment, Direct Methods, Combustion Tube, Emission Spectrograph, X-rays 3. Aluminum: Colorimetric Determination, Gravimetric Determination 4. Arsenic 5. Barium: Determination in New Lubricating Oils, Determination in Used Lubricating Oils 6. Boron:Colorimetric Determination, Alkalimetric Determination 7. Calcium:Determination in New Lubricating Oils and Additives, Determination in Used Lubricating Oils, Estimation of Smaller Concentrations 8.Chromium 9. Cobalt: Electrolytic Determination, Volumetric Determination 10. Copper: Determination in Gasoline, Determination in Naphthenate Driers, Determination in Distillates, Determination in Used Lubricating Oils 11. The Halogens: Peroxide Bomb Combustion, Sodium Dehalogenation, Extraction Procedures, Wickbold Oxyhydrogen Combustion, Potentiometric Determination of Bromide and Chloride, Colorimetric Determination of Chloride, Volumetric Determination of Fluoride 12. Iron: Determination in Distillates, Determination in Used Lubricating Oils, Determination in Naphthenate Driers, Colorimetric Determination, Volumetric Determination 13. Lead: Determination in Naphthenate Driers, Determination in Light Distillates, Determination in Lubricating Oils 14. Manganese 15. Molybdenum: Determination in New Lubricating Oils, Determination in Used Lubricating Oils 16. Nickel:Determination in Distillates, Gravimetric Determination 17. Nitrogen:Determination of Total Nitrogen by Kjeldahl Method, Determination of Basic Nitrogen, Determination of Quaternary Ammonium Compounds 18.Phosphorus: Decomposition by Ashing in Presence of Zinc Oxide, Colorimetric Methods, Alkalimetric Determination of Phosphorus 19.Selenium: Colorimetric Determination, Volumetric Determination 20.Silicon: Determination in Synthetic Oils, Determination of Silica in Used Lubricating Oils 21. Sodium: Decomposition of Sample by Direct Ashing, Gravimetric Determination, Determination by Flame Photometer 22. Sulfur: Determination by Peroxide Fusion Bomb, Determination by Wickbold Oxyhydrogen Combustion 23. Vanadium: Determination in Distillates, Determination in Fuel Oils, Volumetric Determination 24.Zinc: Determination in Additives and Naphthenate Driers, Determination in New and Used Lubricating Oils, Potentiometric Determination, Gravimetric Determination; Appendix; Wickbold Apparatus for Oxyhydrogen Combustion; Index

A unique text/reference which gives the procedures for all analysis needed to control any phase of electroplating. All theories behind these analyses are explained in detail. Better analytical technique and therefore better product, will result from the thorough understanding of the chemistry involved.

Those involved in the design, operation, or maintenance of industrial boilers will find this book an invaluable source of information. The clarity and accuracy of presentation allows this book to function as a manual as well as a text.

Foreword- PART I. BASICS - 1. Introduction 2. Studio Planning 3. Sound Insulation 4. Reverberation 5. Air-Conditioning System Noise Limits 6. Sound-Retardant Windows and Doors 7. Instrument Isolation for Multiple Track Recording 8. Studio Testing 9. Plumbing Noise Control 10. Vibration Isolation 11. Suspended Acoustic Ceiling 12. Elevators 13. Interior Decor of Studios 14. Sound Power Versus Sound Pressure PART II. STUDIOS - 15. Control Rooms 16. ADR Studios 17. Re-Recording Studios 18. Reverberation Chambers 19. Motion Picture and TV Stages 20. Music Recording Studios 21. Review Rooms 22. Future Sound-Recording Studios 23. Canopied Amphitheaters PART III. ELECTROACOUSTICS - 24. Microphone Properties 25. Loudspeaker Sensitivity 26. Electronic Light Dimmers - Index Sound recording studios are often built like showcases, either to attract clientele or to provide a distinctive image for the industry. They are, thus, like people, in that no two of them are alike. Yet, all such structures have to have certain common acoustic elements if they are to function to the best artistic and economic advantages. The enclosures must be sufficiently quiet, exhibit proper reverberatory conditions (often required to be adjustable), be devoid of parallelisms between hard surfaces, have no sound-focusing concave surfaces, be free of vibrations from external and internal sources, etc. It is for the purpose of providing first design principles of sound recording studios that this book has been prepared, so that for any given size structure, satisfactory vocal and instrumental recording conditions can be established therein. All equations involving physical quantities are given both in the English and the MKS system of measurement. Also, when the description of existing studios includes linear dimensions, their metric equivalents follow in parenthesis, as is also done for such quantities as surface density (mass per unit area) and sound absorption.

Accurate chemical water treatment and skillful maintenance are key elements to attain optimal boiler operation. Boiler Water Treatment: Principles and Practice analyzes the fundamentals of the mechanical operation of boilers, together with the applied chemistry required to achieve waterside cleanliness and costeffective and optimal boiler operation.

An indispensable reference source and training tool not only for kiln operators, but for supervisors and management staff as well. Extensive discussions on pre-heater and pre-calciner operations are included. The appendix includes a section with conversion tables, definitions of common terms relating to rotary kilns, and a suggested outline for a training program for new operators.