NEW PRODUCTS
RACINE
Since 1890...
Specializes
Mortar and Pestle Sets. Sets made of boron carbide are now available. Company points out that this is the hardest molded material commercially available, with Knoop hardness of 2800. Titanium carbide sets available for nuclear work. Norton Co. P-42
in t h e L a r g e s t S e l e c t i o n s of
TIMERS
Timers and Chronographs GALLET £ GUINAND TIMERS Available at Scientific Supply Firms. If unobtainable locally, write us.
Write
for
For All Research Laboratory a n d
JULES RACINE&COMPANY,INC. Specialists in Fine Timers—Since 1890 7 0 WEST 4 7 t h STREET. N E W YORK 3 6
Circle No. 135 on Readers' Service Card
New
Precision!
New C o n v e n i e n c e !
New V e r s a t i l i t y !
Hilffcr MICRO-FOCUS X-RAY UNIT . . . best for all diffraction studies . . . ideal for large lattice structures
ONLY MICRO-FOCUS OFFERS:
• • • •
Greater x-ray flux Less scattered radiation Superior resolution Shortest exposure
EXCELLENT FOR X - R A Y MICRORADIOGRAPHY: Hilger Micro-Focus lends itself t o many applications in studies o f biological microstructures: microporosity and inclusions in metals, microparticle analyses in criminology, etc Interchangeable 4 0 a n d 1 0 0 micron f o c a l spots sharpen details in l a r g e r a d i o g r a m s
Jarrell-Ash Company 3 2 Farwell street, Newtonville 60, Massachusetts Circle No. 46 on Readers' Service Card
94 A
·
ANALYTICAL CHEMISTRY
P-44
Plastic Microdiffusion Dish. Designed for studies on release and absorption of gases, the dish is said to be inert to most chemicals, have low surface tension, and be completely wettable. Center well is recessed for ease of titrating. Chicago Apparatus Co. P-45 Visibility Baths. New line of 11 sizes includes heated models and those containing heating and refrigerating elements. Apparatus consists of Pyrex jar, cork mat, and operation and control units. Temperature constancy of ±0.04° to ±0.15° C. claimed. American Instrument Co. P-46 Flash
Point
Recorder.
Unit automatically samples a stream, runs flash test, and records the result. Results are said to correlate with ASTM D-56 within ± 2 ° F. Range covered is from 80° to 190° F. Precision Scientific Co. P-47
features:
Jaco
Controlled Infrared Source. Model PE521-1 is a controlled black body reference standard and can be used, the company says, as a secondary standard of radiant energy. Perkin-Elmer Corp.
Continuous
EXTRA-FINE, HIGH INTENSITY FOCAL SPOT
Brilliant point source offers unmatched performance in diffraction analyses of natural and synthetic fibers, plastics, waxes, grease, steroids, proteins, pharmaceuticals; in metals research. Extra-fine, high intensity microsource assures fastest exposure on large lattice materials or microsamples. No need for large, hard-to-grow crystals. Write for new catalog today.
Environmental Cabinets. New line, the Weatherlab, can sustain temperatures from - 1 2 0 ° to 350° F., and humidities from 20% to 98%. Sizes range from 5 cu. ft. to large walk-in types. Hudson Bay Co. P-43
Lafesf
CATALOG
Technical Uses
5 X 48 in. internal heated length. Hevi-Duty Electric Co. P-4I
Adhesive Labeling Tape. Time HiTemp tape is said not to age, discolor, or deteriorate at temperatures from - 7 0 ° to 550° F. Available in 300-in. rolls in 5 widths from % in- to 2 in. Takes pencil', ink, or ball point impressions. Professional Tape Co. P-48 Time Lapse Photograph Equipment.
Emdeco line automatically photographs various materials under a microscope. Records long-period temperature, time, or environment changes on a few feet of film. Aloe Scientific. P-49 Pharmaceutical Graduates. Polypropylene graduates in four sizes—4, 8, 16, and 32 ounces—are available. Graduated in ounces and milliliters. Company says they can be autoclaved repeatedly. The Nalge Co. P-50
