152
I N D U S T R I A L A N D E N G I N E E R I N G CHEMISTRY
Manufactires' Publications In asking for any of the bulletins described below, please designate them by number. Requests should be addressed to Advertising Manager, Industrial and Engineering Chemistry, 332 West 42nd St., New York, Ν. Υ., and all such requests must show business connection and title. AUTOMATIC START INDUCTION* POLYPHASE
MOTORS. This bulletin describes a type of general purpose motor suitable for applications requiring high starting torque with low starting current such as is needed for refrigeration compres sors and similar automatically controlled equipment. The bulletin is concisely written, giving a detailed engineering description of its construction and operating characteristics. BS-J+S. HALL AND P E B B L E M I L L OPERATION.
A
compact booklet carries some interest ing suggestions about obtaining the maximum operating efficiency in the use of ball and pebble mills. Among the subjects covered are the angle of break in a mill, milling practice, grinding media, and other construction details. The bulletin is readable and carries 20 pages of thoroughly interest ing information. BS-tf. CHEMICALS PRICE LIST.
A price list is
available for a long list of chemicals and raw materials of interest to manu facturers of cosmetics, pharmaceuti cals, soap, and similar materials. Some of the chemicals listed are tonnage items and others are the type of ma terial needed in relatively small units where the manufacturing operation requires quantity materials but is not conducted on à large scale. Β3-52. CLEANING TOOLS.
An interesting bulle
tin has been issued describing a type of rotary cleaning tool designed to remove paint, scale, rust, and other accumulations from steel at low cost. Cleaning or chipping action of these tools is supplied by a large number of burrs or cutters loosely fastened to a rotating head. The tools are portable and are powered either by compressed air or by a self-contained electric motor. B3-U7. EYE
PROTECTION G U I D E .
An interesting
chart issued by a well-known manufac turer of safety goggles designates the type of goggles recommended for differ ent operations involving eye hazards. The various types are identified by photographs and a concise description. A list of 200 branch offices maintained around the country for immediate serv ice is included. B3-Jfi. KOMPAK A I R FILTERS.
This 8-page bulle
tin describes a type of dry fabric filter which combines the principles of large area, low velocity, and renewable me dium in one unit. The bulletin shows pictures and gives descriptions of a number of different type units employ ing the Kompak cell. Construction, servicing, and mechanical features are covered concisely, and the bulletin concludes with an interesting list of users, among whom are many impor tant process industry names. B3-50. MANOMETERS. A handy little pocketsized book has been issued reviewing the manometer and its usefulness in industrial work. I n addition to a dis cussion of the manometer design and application, the bulletin concludes with some tables and engineering formulas for calculation of flow. B8-5Î. PRESSURE TREATED TIMBER.
This 20-
page booklet discusses pressure processes for treating timber, their economy
and uses in a variety of indust rial plants. A number of illustrations show the use of treated timber. These uses are thoroughly discussed from the point of view of long life and economy. B8-5J,. RUBBER
ANTIOXIDANTS.
A
well-known
chemical manufacturer has issued η handy pocket-size data book showing a series of laborator}' tests made on Santoflex B. The first page givespecifications. Other pages record in detail a series of tests made on different types of rubber stock. B3-.Î4· SPENCE REGULATORS.
This 20-page cata-
log gives a series of concise engineering descriptions of regulators applied to a variety of industrial operations. These regulators are controlled entirely from delivery pressure. Among the industrial applications described are differential control, pump control, back pressure regulation. The bulletin also describes the Spence type of temperature regulator, together with a combination of temperature and pressure regulators. B3-53. STEAM J E T S , EJECTORS, SPRAY NOZZLE*.
A recently issued bulletin describes a line of equipment produced by a wellknown manufacturer who has specialized in fabrication from corrosionresistant alloys. An interesting feature is a copyrighted chart designed to simplify the selection of the correct size jet for heating any volume of liquid, with steam pressures varying from 15 to 85 pounds. T h e steam consumption in pounds per hour is automatically computed a t the same time. B3-49. W-B PERIODIC PROCESS OF CHLORINA-
TION. An interesting 8-page folder describes the u*e of this process for desliming condensers. The authors describe the investigations which led to the conclusion that periodic chlorination could cut cleaning costs below those for the mechanical operation usually used. BS-56. WETTINQ AGENTS.
VOL. 16. NO. 5
tion o f both s i r and carbooa dioxide in beer which is rapid, requires little equipment and little skill, and whuch enables the operator to enjoy the beer sample. This method is also appdicaole *,o determination of air and carbon dioxide in ginger ale, coca cola, and otiier carbonated drinks. The presence of ethyl alcohol, methanol, olives, cherries, bitters, distillates of fermented cereals, or ice does not affect the accuracy of the method; in fact, a modicum o r two of ethyl alcohol may have a very desirable effect. Almost any chemist c a n develop the technic in a short time, though there are some individuals who h a v e an inherent talent and require no training whatever. PROCEDURE. Seated Lu a comfortable chair, and surrounded b y convivial company, the operator takes the sample of beer o r other liquid, operts the bottle with a standard opener (#), amd pours it into a glass. If the operator i s very skilled, he may dispense with the glass. He then pours the sample down his gullet at a proper speed, soon acquired by practice. When sample is all disposed of, the check valve in the throat is operated so as to permit t h e escape of the liberated gases, with a noise which resembles mo other noise on earth. These gases are passed through a stream of caustic, whicrh dissolves the C0 2 ; the volume of the residual air is determined by noting the rise of air pressure in the room. To determine the amount of C0 2 absorbed in the caustic, the solution is treated with quicklime, and the resulting CaCOa precipitated and determined by t h e most cumbersome gravimetric method known. CALCULATION. To calculate per cent CO* arid per cent air, t h e following equation is used. log cabin
Σ Q - t*)
2 logs on fire X f U # 6 N J me where Ρ is the reaction product of the beer, R is the ne?d, Republican president, and Δ. is the capa-city of the beer-drinker Literature Oited Ί) Gray and Stone, IND. E N Q . CHEM., Anal. Ed.. ΙΟ, 15 (1938). (2) Schmidt, J, Applied Beerology,2> 2 (2).
This 40-page bulletin
is really a technical study of wetting agents and the factors contributing to their activity. The underlying chemical factors in the use of wetting agents is discussed thoroughly. Then follows a series of specific recommendations for the use of Triton W-30 for such applications as wetting out, fiber swelling, penetration, dyeing or detergency, and for dispersion. The industrial reader will find this bulletin a thoroughly workmanlike discussion of the subject. B8-66.
Emanations Determination of Air a n d Carbon Dioxide i n Beer XISTING methods for the determination of air and carbon dioxide in E beer require more or less cumbersome and expensive apparatus, skilled operators, and an appreciable amount of time. That described by Gray and Stone (1), while offering several improvements over previous methods, still leaves much to be desired. The present author has developed a method for the simultaneous determina-
UnkiMvwns
B
EASTLY little compound in a flask, "What are youf" assistants ask. I seek you manv and maaiy a day. AT LAST. A t LAST! I proudly say. I have you snared. . T h a t 1 will prove. All is well and God is love. But lo!!! I slave and slave and slave. That awful wretch, tliat traitor-knave Derivative has slipped nay grasp; Its melting point I cannot clasp. My bubble breaks My body aches I'm sure I have it, but it's not here Alack! Ah woe! It's wrong, I fear. I try again. . . I t still eludes. You beast.. . . You bring my sullen moods To t o p and take my temper... But still I try and try. . . Sic semper! CLA-RA M. HICKOX
