PAPER or STARCH
THE FASTEST TOEPLER PUMP THE URRY AUTOMATIC TOEPLER PUMP
ELECTROPHORESIS OUTFIT
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for
details
Lares piston volume allows for a high pumping speed. 40 sec. pumping cycle. A volume of 2 liters can be reduced to 0.15% in approximately 10 minutes. (Cycle can be shortened by using higher speed forepump.) Maximum work ing pressure is 35 mm. Hg. Specially modified, the Urry Automatic Toepler Pump will circulate gases at pressures as high as 300 mm m ttb * ^ s a c ' r c u ' a * ' n S pump it will operate J at pressures below 150 mm. Its ruggedness and compactness make the Urry Automatic Toepler Pump a very useful laboratory 1 apparatus.
WI-5300 Pi. "^
Consisting of: ELECTROPHORESIS-CHAMBER made of clear Methacrylate plastic. 3 Different paper carriers, one of them water-circulated. S Platinum electrodes 4 " long. Leveling device between buffer chambers. Plate glass cover. POWER-SUPPLY 500V lOOMa. Equipped with Polarity reversing switch. Full wave rectification, 7 Tubes. DC Voltage control from 0 to 500 Volts. PRICE: M o d . EP-3C Complete outfit For further information write to:
Scientific
glassblowing,
1000 cc Price ea. $1 50.00 500 cc Price ea. 145.00 250 cc Price ea. 140.00 Less 5% en lots of 3 or more of on? size.
crystals,
films, and
furnaces
$198.00
WAKEFIELD INDUSTRIES, I N C .
LABORATORY GLASS SUPPLY CO.
Nucleonic Park Skokie (Chicago), Illinois
Manufacturers of Scientific Instruments 6 1 0 West 150th Street, N e w York 3 1 , Ν . Υ. Circle No. 55 A-1 on Readers' Service Card, page 49 A
Circle No. 55 A-2 on Readers' Service Card, page 49 A
For laboratory investigations, analytical tests or production control requiring heat testing . . . specify a
DESPATCH LABORATORY OVEN a qualified lah assistant m • • •
Accurate, Fast, Rugged Sensitive Indicating Control Forced Air Circulating System Nine Models To Choose From
Here is the practical solution for laboratories, manufacturers and chemical producers who oper ate with close temperature requirements. Despatch has more than 52 years' experience in designing and producing laboratory ovens, and has placed emphasis where it belongs—on rugged construction and temperature uniformity —constant heat with even distribution—the ability of its ovens to perforin accurately at peak temperatures for extended periods of time. Nine basic models provide oven capacities from 1 to 60 cubic feet. The largest Despatch Ovens in the laboratory line are truck loaded for processing large quantities of materials.
DESPATCH LABORATORY OVENS, finished in hand some gray hammeroid enamel, offer a combination of controls especially designed for the application for regulating temperatures up to 600 degrees. An efficient forced exhaust system carries off volatile gases or moisture laden air for hazard safe, fast drying laboratory test work. For complete data on Despatch Laboratory Ovens, write for Bulletin # 1 0 0 stating product to be processed, time and tem perature cycle and size of oven required.
DESPATCH OVEN COMPANY
DESPATCH
3 4 1 DESPATCH BLDG., M I N N E A P O L I S 14, M I N N . For further information, circle number 55 A-3 on Readers' Service Card, page 49 A
V O L U M E 2 7, NO. 2, F E B R U A R Y
1955
55 A
