NEW BOOKS
1
Outstanding New HOT PLATE Has Many Exceptional Features —* •— — UNIQUE IN DESIGN - TOPS IN PERFORMANCE! Completely new in design scientifically engineered with the latest advances these TEMCO HOT PLATES bring added efficiency to the modern labora- tory or shop. • ^ SENSITIVITY OF CONTROL·... is *^ψ unusual, particularly in lower temper- ature ranges, and makes plate adaptable to many critical uses, such as drying tissues and micro slides as well as general heating;. FAST HEATING CAST ALUMINUM TOP. . .Plate heats fast and evenly. The 6" χ 6" top permits greater usable surface area. LONG LIFE HEATING ELEMENTS .. .Heating elements are made from highest quality nickel-chromium alloy to assure long life precision engineered to operate at high efficiency.. .operates on 110 V. Power consumption 660 watts. Thermostat contacts are high grade silver and large diameter for cool operation. Economical to own and operate. MINIMUM HEAT LOSS. . .The heat- ing plate is well insulated on the bottom and is mounted within the metal body with only four small points of physical contact to allow heat conduction to the metal body. LIGHT WEIGHT... Weighs only 4>/ 2 lbs., but is easily capable of supporting many times its own weight. DOUBLE DOVETAIL SOCKETS... are permanently attached to facilitate making apparatus set-ups, both for sus- pension of the plate beneath the appa- ratus and for suprort of apparatus when the plate rests on «is feet. WIDE TEMPERATURE RANGE. .. New and improved thermostat provides variable control from just above room temperature to 700 degrees F. (371 de- grees C). Temperature variation is held within 5 degrees at 100 degrees F. and within 2 degrees fru ι 200 degrees F. to maximum. NEON INDICATING LIGHT. while the hot plate is heating. .glows No. N-19765 Only $19.75 ΤΪΪ!?ΙΪΪΓ!ΒΙΪ? LABORATORY APPARATUS & REAGENTS INDUSTRIAL CHEMICALS 131 W. Hubbard St. Chicago 10, III. BEYOND THE FLYLEAF easily adapted to the values of the physi- cal constants in current use at any future time. It employs the argument hci>/kT and tabulates the computed values of the functions in terms of the gas constant R as a unit. The tables are entitled "Contributions to the Thermodynamic Functions by a Planclc-Einstein Oscillator in One Degree of Freedom" and may be obtained on application to the Superin- tendent of Documents, Government Printing Office, Washington 25, D. C, specifying publication number NAVEXOS P-646. The price is 60 cents. Import Duties Information The U. S. Tariff Commission has issued its second supplement to "United States Import Duties (1948)," which brings the original document up to date as of Jan. 1, 1950. The supplement, which is cumula- tive, replaces the first supplement issued in August 1948. Most of the changes negotiated at Annecy, France, during 1949 have not been included since the President has not yet proclaimed them. Among items affected are digitalis gluco- sides; balsams; ipecac; animal glue; ani- mal, vegetable, fish, whale, and essential oils; mica; lenses; copper and lead ores; and limestone for fertilizer. Durability o f Tor Surfacings Research with the object of improving the durability of tar surfacings is being carried out at the Road Research Labora- tory of the Department of Scientific and Industrial Research, London. The first stage of the work is described in "Road Research Technical Paper No. 16—The Reaction of Oxygen with Tar Oils." The laboratory has been studying the causes of weathering in tar and has established that the most important agent is the oxygen in the atmosphere acting chemi- cally upon the constituents of the tar. The publication may be ordered from Rex- House, 4-12 Regent St., London, S.W. 1, England for 25 cents. Soap and Detergent Standards The November 1949 edition of "ASTM Standards on Soaps and Other Detergents" is said to bring together in convenient form for use in industry all of the ASTM standards pertaining to the subject. There are 32 specifications and tests giving qual- ity requirements. Specifications for soap cover bar and various kinds of chip soaps; pondered and salt water soaps; olive oil and palm oil solid soaps; milled, floating, and liquid toilet soaps. Specifications for detergents cover borax; soda ash; caustic and modified soda; sodium bicarbonate, metasilicate and sesquisilicate; trisodium phosphate; and tetrasodium pyrophosphate ( anhydrous ). Copies of this 132-page compilation, heavy paper cover, can be obtained from American Society for Testing Materials, 1916 Race St., Philadelphia 3, Pa., at $1.75 each. Photographic Science Magazine A new technical journal, Photographic Science and Technique is being issued as a supplement to the official monthly PSA Journal of the Photographic Society of America, and is intended specifically for papers and articles dealing with the scien- tific and technical aspects of photography. General Electric Co/s technical division is directing the plans for the new journal. The editorial staff is headed by Paul Arnold, executive assistant to the technical director of Ansco. World Chemical Directory The Atlas Publishing Co., 425 West 25th St., New York 1, Ν. Υ., announces the availability of the "World Chemical Directory," 1949 edition. It contains 700 pages listing over 18,000 firms located all over the werld that are importers, ex- porters, and manufacturers of chemicals, drugs, plastics, and oils. There are listings in French, English, and Spanish. There is also a listing of brand and trade names. The directory sells for $10. Nieuwland Lectures The Nieuwland Lecture series of 1948 by Alexander R. Todd of the University of Cambridge, England, have been pub- lished by the University of Notre Dame, Notre Dame, Ind. Copies of "Vitamins, Coenzymes, and Nucleotides," are avail- able from the university for $1.00. MEW BOOKS Advances in Agronomy, Vol. I. A. G. Norman, editor, xii -j- 439 pages. Aca- demic Press, Inc., 125 East 23rd St., New York, Ν. Υ. $7.50. Chemical Industries. 22nd ed. Ε. Ν. Tiratsoo, editor. 352 pages. Leonard Hill Ltd., 17, Stratford Place, London, W.l. $4.20. Documentation. S. C. BRADFORD. 156 pages. Public Affairs Press, 2153 Florida Ave., Washington, D. C. $3.00. Flow Measurement and Meters. A. LIN- FORD, xx -f- 336 pages. E. & F. N. Spon Ltd., 22, Henrietta St., W.C.2, London. $4.20. Frontiers in Colloid Chemistry. R. E. Burk and Oliver Grummitt, editors. 157 pages. Interscience Publishers, Inc., 215 Fourth Ave., New York 3, Ν. Υ. $4.00. Polishes—Their Raw Materials and Manufacture. 2nd ed. J. DAVTDSOHN AND A. DAVTDSOHN. 175 pages. Leon- ard Hill Ltd., 17 Stratford Place, Lon- don, W.l. $2.10. Quantitative Ultramicroanalysis. P. L. KIRK, vii -+- 310 pages. John Wiley & Sons, Inc., 440 Fourth Ave., New York 16, Ν. Υ. $5.00. Thermodynamics—Principles and Appli- cations to Engineering. -INC. ERNST SCHMIDT. Translated from Third Ger- man Edition by J. Kestin. xx -f- 532 pages. Oxford University Press, 114 Fifth Ave., New York 11, Ν. Υ. $7.00. 500 CHEMICAL AND ENGINEERING NEWS
Transcript of NEW BOOKS
Outstanding N e w HOT PLATE Has Many Exceptional Features —* •— —
UNIQUE IN D E S I G N -TOPS IN PERFORMANCE!
Completely new in design scientifically engineered with the latest a d v a n c e s these TEMCO HOT PLATES bring added efficiency to the modern laboratory or shop.
• ^ SENSITIVITY OF CONTROL·... is *^ψ unusual, particularly in lower temper
ature ranges, and makes plate adaptable to many critical uses, such as drying tissues and micro slides as well as general heating;.
FAST HEATING CAST ALUMINUM T O P . . .Plate heats fast and evenly. The 6" χ 6" top permits greater usable surface area.
LONG LIFE HEATING ELEMENTS . . .Heating elements are made from highest quality nickel-chromium alloy to assure long life precision engineered to operate at high efficiency.. .operates on 110 V. Power consumption 660 watts. Thermostat contacts are high grade silver and large diameter for cool operation. Economical to own and operate.
MINIMUM HEAT L O S S . . .The heating plate is well insulated on the bottom and is mounted within the metal body with only four small points of physical contact to allow heat conduction to the metal body.
LIGHT WEIGHT. . .Weighs only 4>/2 lbs., but is easily capable of supporting many times its own weight.
DOUBLE DOVETAIL SOCKETS. . . are permanently attached to facilitate making apparatus set-ups, both for suspension of the plate beneath the apparatus and for suprort of apparatus when the plate rests on «is feet.
WIDE TEMPERATURE RANGE. . . New and improved thermostat provides variable control from just above room temperature to 700 degrees F. (371 degrees C ) . Temperature variation is held within 5 degrees at 100 degrees F. and within 2 degrees fru ι 200 degrees F. to maximum.
NEON INDICATING LIGHT. while the hot plate is heating.
.glows
No. N-19765 Only $19.75
ΤΪΪ!?ΙΪΪΓ!ΒΙΪ? LABORATORY APPARATUS & REAGENTS
INDUSTRIAL CHEMICALS
131 W. Hubbard St. Chicago 10, III.
BEYOND THE FLYLEAF
easily adapted to the values of the physical constants in current use at any future time. It employs the argument hci>/kT and tabulates the computed values of the functions in terms of the gas constant R as a unit. The tables are entitled "Contributions to the Thermodynamic Functions by a Planclc-Einstein Oscillator in One Degree of Freedom" and may be obtained on application to the Superintendent of Documents, Government Printing Office, Washington 25, D. C , specifying publication number NAVEXOS P-646. The price is 60 cents.
Import Duties Information The U. S. Tariff Commission has issued
its second supplement to "United States Import Duties (1948)," which brings the original document up to date as of Jan. 1, 1950. The supplement, which is cumulative, replaces the first supplement issued in August 1948. Most of the changes negotiated at Annecy, France, during 1949 have not been included since the President has not yet proclaimed them. Among items affected are digitalis gluco-sides; balsams; ipecac; animal glue; animal, vegetable, fish, whale, and essential oils; mica; lenses; copper and lead ores; and limestone for fertilizer.
Durability of Tor Surfacings Research with the object of improving
the durability of tar surfacings is being carried out at the Road Research Laboratory of the Department of Scientific and Industrial Research, London. The first stage of the work is described in "Road Research Technical Paper No. 16—The Reaction of Oxygen with Tar Oils." The laboratory has been studying the causes of weathering in tar and has established that the most important agent is the oxygen in the atmosphere acting chemically upon the constituents of the tar. The publication may be ordered from Rex-House, 4-12 Regent St., London, S.W. 1, England for 25 cents.
Soap and Detergent Standards The November 1949 edition of "ASTM
Standards on Soaps and Other Detergents" is said to bring together in convenient form for use in industry all of the ASTM standards pertaining to the subject. There are 32 specifications and tests giving quality requirements.
Specifications for soap cover bar and various kinds of chip soaps; pondered and salt water soaps; olive oil and palm oil solid soaps; milled, floating, and liquid toilet soaps. Specifications for detergents cover borax; soda ash; caustic and modified soda; sodium bicarbonate, metasilicate and sesquisilicate; trisodium phosphate; and tetrasodium pyrophosphate ( anhydrous ).
Copies of this 132-page compilation, heavy paper cover, can be obtained from American Society for Testing Materials,
1916 Race St., Philadelphia 3, Pa., at $1.75 each.
Photographic Science Magazine A new technical journal, Photographic
Science and Technique is being issued as a supplement to the official monthly PSA Journal of the Photographic Society of America, and is intended specifically for papers and articles dealing with the scientific and technical aspects of photography.
General Electric Co/s technical division is directing the plans for the new journal. The editorial staff is headed by Paul Arnold, executive assistant to the technical director of Ansco.
World Chemical Directory The Atlas Publishing Co., 425 West
25th St., New York 1, Ν. Υ., announces the availability of the "World Chemical Directory," 1949 edition. It contains 700 pages listing over 18,000 firms located all over the werld that are importers, exporters, and manufacturers of chemicals, drugs, plastics, and oils. There are listings in French, English, and Spanish. There is also a listing of brand and trade names. The directory sells for $10.
Nieuwland Lectures The Nieuwland Lecture series of 1948
by Alexander R. Todd of the University of Cambridge, England, have been published by the University of Notre Dame, Notre Dame, Ind. Copies of "Vitamins, Coenzymes, and Nucleotides," are available from the university for $1.00.
MEW BOOKS Advances in Agronomy, Vol. I. A. G.
Norman, editor, xii -j- 439 pages. Academic Press, Inc., 125 East 23rd St., New York, Ν. Υ. $7.50.
Chemical Industries. 22nd ed. Ε. Ν. Tiratsoo, editor. 352 pages. Leonard Hill Ltd., 17, Stratford Place, London, W.l. $4.20.
Documentation. S. C. BRADFORD. 156 pages. Public Affairs Press, 2153 Florida Ave., Washington, D. C. $3.00.
Flow Measurement and Meters. A. LIN-FORD, xx -f- 336 pages. E. & F. N. Spon Ltd., 22, Henrietta St., W.C.2, London. $4.20.
Frontiers in Colloid Chemistry. R. E. Burk and Oliver Grummitt, editors. 157 pages. Interscience Publishers, Inc., 215 Fourth Ave., New York 3, Ν. Υ. $4.00.
Polishes—Their Raw Materials and Manufacture. 2nd ed. J. DAVTDSOHN AND A. DAVTDSOHN. 175 pages. Leonard Hill Ltd., 17 Stratford Place, London, W.l. $2.10.
Quantitative Ultramicroanalysis. P. L. KIRK, vii -+- 310 pages. John Wiley & Sons, Inc., 440 Fourth Ave., New York 16, Ν. Υ. $5.00.
Thermodynamics—Principles and Applications to Engineering. -INC. ERNST SCHMIDT. Translated from Third German Edition by J. Kestin. xx -f- 532 pages. Oxford University Press, 114 Fifth Ave., New York 11, Ν. Υ. $7.00.
500 C H E M I C A L A N D E N G I N E E R I N G N E W S
