NEW PRODUCTS Mechanical Dewar Flask. Serfass me chanically refrigerated unit eliminates need for dry ice-acetone baths, auto matically provides temperatures down to - 1 4 0 ° F. Milton Roy Co. P-48
sample; costs $1 to $2 per sample, de pending on the number of samples sub mitted during a year. United States Testing Co. P-52 Dreiding Stereomodels. Factor for converting to angstroms is 0.4 A./cm.; push button type mechanism assures correct bond length ; single bonds freely rotatable without wear. Schaar and Co. P-53
Pouring Spouts. Vented-Flow poly ethylene models fit ground neck of reagent bottles, nonstandard or stand ard taper : available in 9 sizes ; equipped with dust caps. Pioneer Plastics. P-49
Dust Hood. Microvoid has blower at top which forces air through largearea filter into hood; said to remove airborne dust particles down to 0.5 micron. Air-Shields, Inc. P-54
Desktop Chromatography Lab. Mul tiple-strip unit can run as many as 6 different solvent systems at one time ; produces 1-dimension ascending or de scending strip chromatograms in 1 to 2 hours. Alicrochemical Specialties Co.
High Vacuum Pumps. Electronic Series 110 UlteVac pumps 0.7 liter per second; weight of pump unit and ac companying magnet, 1.6 pounds; out side diameter of magnet, 2 inches. Ultek Corp. P-55
P-50
Automatic Spectropolarimeter. Unit records rotatory dispersion over the 200 to 700 millimicron range; follows opti cal rotation kinetics or mutarotation at any desired wave length in the range. Rudolph Instruments Engineering Co.
Lambda Pipets. New line features Accu-red markings in large block num bers; conform to ACS Committee on Microchemical Apparatus recommenda tions; available in capacities from 1 to 500 microliters. Corning Glass Works. P-56
P-51
Soils Analysis Service. Test reports are submitted two days after receipt of
pH Meter. Metrion has duplex scales covering pH ranges from 0 to 10.0 and from 4.0 to 14.0; accepts all modern pH electrodes; price $139. Coleman Instruments, Inc. P-57 Laboratory Spectroscope. DuoSpectranal compares unknown sample with comparison solution; wave length on projected illuminated scale can be read to ± 5 Α., according to the com pany. Fisher Scientific Co. P-58 Air-Cooled Hydrogen Lamp. Type HAK-50 is designed for use with Bausch & Lomb hydrogen arc illuminator; suggested list price, $100. Sylvania Electric Products Inc. P-59 Flexible Glove Cabinet. Model GC-2 has collapsible frame of plated steel rod; compartment is made of welded heavy plastic sheet, features molded plastic zippers; price, $85. The Tor sion Balance Co. P-60 Sharp Flame Hand Torch. Gas fuel and oxygen are kept separate up to the burner face, producing better flame performance, according to the company; operates at fuel pressure of
Announcing A NEW 54-PAGE CATALOG
new england nuclear
OF
HIGH SPECIFIC ACTIVITY TRITIATED ACETIC ANHYDRIDE Useful
for
the
determination
of
DEWAR
sub-microgram
quantities o f steroids by the d e r i v a t i v e method. Specific activity, 4 0 0 mc per m M ;
p a c k a g e d in
benzene solution in 1 0 0 to 4 0 0 mc quantities. The most comprehensive listing of standard and special Dewar flatlet ever published.
FLASKS
*R. E. Peterson, Proceedings of the Symposium on Advances in Tracer Applications of Tritium, Oct. 3 1 , 1958. (Copies available from NENC.)
L k
CATALOG O N
t
REQUEST
A large variety of standard flasks is listed that can be supplied from stock for both regular laboratory use and cryogenic research. Also included are many pos sible variations which can be produced to aid your engineers in designing special shapes for work in the low temperature fields with liquid hydrogen and helium. M A R T I N - M A D E Dewar flasks are highly evacu ated at high temperatures and all are manufactured without separation pads. Write today for your copy.
H . S . M A R T I N & SON ηεω england nuclear corp. 575 ALBANY
STREET
BOSTON 18, M A S S . Liberty
Circle No. 64 on Readers' Service Card
140 A
·
ANALYTICAL CHEMISTRY
2-5964
1916-20 GREENLEAF STREET · EVANSTON, ILLINOIS SCIENTIFIC GIAS%W*I|[ O» " » S « « * t « #
euJUIIIf
Circle No. 54 on Readers' Service Card
