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Subsidiary of ARAPAHOE CHEMICALS. INC,
GRIGNARD REAGENTS
STRIP RADIOCHROMATOGRAMS AUTOMATICALLY SCANNED Model C-10O " A C T I G R A P H " Strip Feeder' —used with Geigor Counter, Count Rate Meter and Recorder for accurate location of radiolabeled spots. Recorder C h a r t provides permanent record. Write for details today -C1* Chemical List also available.
(RMgX) and the
GRIGNARD REACTION From stock o r t o y o u r o r d e r , i n commercial volume. ( C o m p l e t e Security Assured!)
1,2-DIMETHOXY ETHANE, Anhydrous (Ethylene G l y c o l D i methyl Ether) A s p e c i a l i z e d solvent, c o m p l e t e l y miscible in w a t e r a n d h y d r o c a r bons, a v a i l a b l e in p i l o t a n d commercial v o l u m e . Our Sales Agents Millmaster Chemical Corp. — N . Y. C. William E. Phillips, Inc. —Chicago George M . Bano — Mexico City E. C. Godwin & Associates — Montreal
ARAPAHOE SPECIAL PRODUCTS INfc 1970 — 28th Street ..BOULDER,: COlORAQO Producer* of Spfecibt'Organic Compounds
l-BOBECEJVE
227 W . E r i e Street, Chicago 10, ID-
BOOKS (Continued
from
page
4604)
NEW BOOKS. Practical Refractometry b y Means of the Microscope. R. M. ALLEN. 7 6 pages. R. P. Caxgille Laboratories, 117 Liberty St., N e w York 6, N . Y. 1954. $1.00, Determination of indices of refraction of solids b y microscopical methods. Elementary for beginners but also for advanced workers. Describes in detail more than 2 0 0 available reference specimens for microscopical studies in mineralogy and petrology.
IN BEVERAGES . . . clarifies and prevents cloudiness . . . stays stable a t high temperatures Where clarity is a virtue in beverages you can count on Versene. T h i s powerful Chelating (complexing) Agent permanently inactivates the metallic ions that cause cloudiness a n d precipitation. Longterm toxicity studies, made in accordance with Food & Drug Administration recommendations, show that Versene is safe for use in wines and beverages, particularly in the small quantities needed. It prevents metallic ion contamination a n d acts as a clarifier without formation of precipitates. Versene is made only under patents originated, developed and operated by F. C. Bersworth. Quality a n d uniformity of completing power a r e guaranteed by gram or carload. Investigate Versene now. "Write Dept. A for sample, Technical Bulletin N o . 2 and chemical counsel. *Trade Mark Registered
Organic Syntheses. Vol. 34. Wm. S. Johnson, editor-in-chief. vi -}- 121 pages. John W i l e y & Sons, 4 4 0 Fourth Ave., N e w York 16, N. Y. 1954. $3.50. • Notably Pure and Free from Isomer*
• One of 14 High Purity Olefins in Ihe
Ce t o Cis Range • N o w Available in Commercial Quantities • Ask (or Information and Prices
HUMPHREY-WILKINSON INCORPORATED
Glte+nictd Ma*444factuto&ri> NORTH HAVEN, CONN.
Histopathologic
Technic
Histochemistry.
R. D.
708 shades and types of iron oxide pigments (synthetic and natural)—64 reds, 24 browns, 18 yellows, and 2 blacks
•
Metallic browns, Veneiian reds, ochers, umbers, and siennas m 3 Chromium oxides and 2 hydrates o Cuprous oxide m Barytes, anhydrous calcium sulfate, procipitafed calcium carbonate and whiting
•
For technical data address Dept. 4, C. K. Williams & Co., Easton, Pa.
.••Pcj/r^o'it-St; Louis,HI. Emery viHe, C a u f
4620
ix
SELIG H E C H T .
Re-
vised and expanded by Eugene Rabinowitch. xviii -f- 2 3 7 pages. T h e Viking Press, 18 East 48th St., N e w York 1 7 , N. Y. 1954. $3.75. Written in everyday terms. Additions t o present edition include a compact summary of atomic-bomb developments since 1946, and o f the development of thermonuclear devices resulting in the H-Bomb explosions. Welding E . R.
for
Engineers.
FUNK,
HARRY
UDLNT,
A N D JOHN W U L F F .
ix - | -
430 pages. John Wiley & Sons, 4 4 0 Fourth Ave., N e w York 16, N. Y. 1954. $7.50. Drawing o n principles from physics, mathematics, chemistry, metallurgy, and mechanical engineering, the authors construct an understanding that extends not only to welding and joining b u t to t h e other arts i n t h e general field o f metal fabricating. Biochemical Diseases.
(Formerly Bersworth Chemical Co.) FRAMINGHAM. MASSACHUSETTS
Methyl Hydrazine Unsymmetrical Dimethyl Hydrazine and Their Sulphates Now
available in semi-commercial quantities METALECTRO C O R P O R A T I O N Laurel, M a r y l a n d
-f-
501 pages. T h e Blakiston C o . , 5 7 5 Madison Ave., N e w York 2 2 , N. Y. 1954. $7.50. Attempts to present methods that may b e followed without personal instruction b y one w h o has had previous experience, or a good deal of experimentation i n finding optimal times, temperatures, p H levels, and reagent concentrations. Explaining t h e Atom.
IN PIGMENTS ^AND EXTENDERS"
and Practical LILLEE.
YERSESES I16RP8RATED
Determinants of Microbial R. J. DUBOS. viii -f- 1 5 2 CHEMICAL
FATTY ALCOHOLS: CETYL N.F. LAURYL min. 9 0 % C , 2 STEARYL U.S. P. SODIUM LAURYL SULFATE U.S. P. p o w d e r (also in needle form) manufacturer's exclusive distributors: FALLEK PRODUCTS CO., INC. 165 BROADWAY NEW YORK 6, N. Y.
Now
Available
PURINE 6-CHLOROPURINE HYPOXANTHINE Please wrife for specifications. FRANCIS EARLE LABS., INC. 1 0 5 7 L o w e r South St.
Peekskill, N . Y .
AND ENGINEERING
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