NEW PRODUCTS
how many pans do you want?
designed for use with Model 425 densitometer and the Varioord variable response recorder Model 42 to enable automatic quantitation in routine elec trophoresis measurements. In opera tion tlie lntegraph receives a signal voltage from an outlet on the panel of the Yaricord. The voltage is propor tional to the concentration of the com ponent being scanned. The electronic circuit, of the lntegraph transforms the voltage into recorded pulses whose fre quency is proportional to the voltage and thus to the concentration. The area under the curve is then simply read off the chart by counting the pips between limiting points, yielding an ac curate quantitative result, according to the company. P-6
lor 2?
Λ new dual purpose mixing leak de veloped by the Jeps Co. is said to have broadened the application of pure gas vacuum leaks. The unit can be used
Oxygen-Hydrogen Mixing Leak
both types have advantages
You can get both... ... made to the exacting standards of quality main tained by Ainsworth since 1880. •
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in a manner identical with that of the individual oxygen and hydrogen leaks to produce a variable, reproducible leak rate of reagent grade gas. Jeps says that a novel feature of the new leak is its ability to introduce a con trolled, variable quantity of the pure gas into a stream of carrier gas. The mixing leak is bakable and simple to operate. P-7
Air Comparison Pycnometer
WM. AINSWORTH & SONS, INC. 2151
LAWRENCE
STREET
·
DENVER
Circle No. 17 on Readers' Service Card
98 A
·
ANALYTICAL CHEMISTRY
5 , COLORADO
The Air Comparison Pycnometer in troduced by Houston Instrument Corp. is said to allow complete density meas urement by an unskilled operator in one
