stock and custom preformed electrodes; crucibles and funnels for vacuum fusion analysis; graphite products used in special metallurgical applications.
of mechanical Western area.
high
vacuum
pumps
in
Nester & Faust 1 9 1 0 West 1 l l h St., Wilmington, D e l .
National Instruments Laboratories, Inc. 8 2 8 Evarts St., Ν . Ε. Washington 1 8 , D. C.
Manufactures gas analyzer, sonic type; gas flow meters; surface tensiometers; drop counters; and field emission electron microscopes.
Manufactures clamps, distilling appara tus, and pressure regulators.
N e w England Nuclear Corp. 575 A l b a n y St. Boston 1 8 , M a s s .
N e w Brunswick Scientific Co. P. O . Box 6 0 6 , Somerset St. N e w Brunswick, N . J.
Manufactures labeled radiochemicals of all types, principally carbon-14 and tri tium. Beta and gamma reference sources. Tritium self-luminous paint. Tritium and krypton-85 activated light sources. Carbon14 and tritium health physics services.
Manufactures, develops, and distributes precision laboratory equipment which in clude: "Gyrotory" and reciprocating shak ers ; multiple-tier shakers ; water bathshakers; incubator-shakers; fermentors and fermentor drive assemblies; paper chroma
Nelson Vacuum Pump Co. 2 1 3 3 Fourth St. Berkeley 10, Calif.
Manufacturers high-vacuum pumps and vacuum accessories. Also, repairs all types
NEW TOOLS FOR LABORATORIES TAPNIK* STOPCOCKS THE DIAPHRAGM PLASTIC BURETTE STOPCOCK Delicate Control. Necessary. tions.
Non Sticking—No
Lubricant
Ideal f o r acid a n d alkaline solu-
Tapnik*
replacement
has
for
Tapnik* today.
TP-201 Tapnik* only J 2.00 per dozen $21.60 * Trade Mark Patent Pending
been
defective
widely
used as
stopcocks.
a Try
Satisfaction g u a r a n t e e d .
TP-202 Burette with Tapnik* 25 ml $ 6.00 case of 6 $32.40
TP-203 Burette with Tapnik* 50 ml $ 6.00 case of 6 $32.40
SENSITIVITY 1/100°C. SUITABLE FOR EVERY LABORATORY For regulating temperatures o f electrically h e a t e d baths, ovens, or a p p a r a tus requiring t e m p e r a t u r e control. A v a i l a b l e in the f o l l o w i n g t e m p e r a ture ranges. No. 2121—0-100° C. No. 2124—0-220° F. No. 2122—0-250° C. No. 2125—0-350° F. No. 2123—0-350° C. No. 2126—0-500° F. Please specify 6 inch or 12 inch stem when ordering.
GENERAL
DESIGNED FOR QUICK—EASYACCURATE ROTATING MAGNETIC ADJUSTMENT • • • •
No flickering or burning of contacts. Control point quickly stabilized. Suitable up to 3000 contacts per hour. Temperature can be read simultaneously. • Totally enclosed metal contacts are raised or lowered by magnetic action. • Self-contained Thermo-Regulator is designed for long, trouble-free service.
[email protected]} and &hemtcali $ot Dnduitxu and Science
LABORATORY SUPPLY COMPANY P. O . B O X 2 6 0 7 · P A T E R S O N , N . J . « A R M O R Y 8 - 3 3 0 0
Circle Nos. 44 A-1, 44 λ-2 on Readers' Service Card
·
N e w York Laboratory Supply Co., Inc. 7 6 Varick St., N e w York 1 3 , Ν . Υ.
Distributes a complete line of instruments and apparatus such as glassware, lab furni ture, lab chemicals, pumps, ovens, incuba tors, and many other items for all laboratory needs. Nylab also manufactures its own voltage stabilizer for spectrophotometers, mechanical hand apparatus clamp, Flame Master gas burner, filter bell, filter grip, Poly wash bottles, and many other items. Norton Company N e w Bond St. Worcester 6 , M a s s .
Laboratory ware, NORBIDE boron car bide mortars and pestles, high temperature refractories, electrochemicals. Details on request. NRC Equipment Corporation 160 Charlemont St. Newton 6 1 , M a s s .
Manufactures complete line of high and ultra-high vacuum components, systems, and equipment including freeze driers, imprégnât ors, altitude chambers, gas in metal analyzers, and all kinds of furnaces. Nuclear-Chicago Corp. 2 2 3 West Erie St. Chicago 10, HE.
Manufactures radiation measuring instruments for research, medical, educational, and industrial applications. Line includes scalers, ratemeters, portable survey units, detectors, gamma-ray spectrometers, moisture and density gages, subcritical reactor, radiochemicals, standards, sources and nuclear accessories. Nuclear Corporation of America Instrument and Research Div. 2 Richwood PI. Denville, N . J.
PRECISION THERMO -REGULATOR
76 A
tography drying ovens; tissue culture, roller tube apparatus; peristaltic metering pumps; for medical and laboratory and industrial research.
ANALYTICAL CHEMISTRY
Manufactures radiation equipment including amplifiers, counters, crystals, pulse height analyzers, scalers, and survey meters. Also monochromators, vacuum gages, nuclear level gages, and pressure devices. Nuclear Electronics Corp. 2 9 2 5 N . Broad St. Philadelphia 3 2 , Pa.
Manufactures nuclear instrumentation. A complete line of laboratory scalers, ratemeters, amplifiers, analyzers, detectors, and survey instruments. Complete specifications available. Nuclear Measurements Corp. 2 4 6 0 North Arlington A v e . Indianapolis 18, Ind.
Manufacturer of precision, high yield, low background, internal flow gas proportional counters. Ideal for C-14 studies. Also, air monitors, scalers, portable Geiger and scintillation survey instruments, counting ratemeters, single channel analyzers, paper chromatograph scanner, and complete line of medical instruments and accessories.
