PITTSBURGH EXPOSITION
ADIABATIC CALORIMETER
cision balances with capacities to 4000 grams ; multipurpose model for rapid con trol weighings. All balances feature weighing by substitution for highest accuracy; built-in weights, optical pro jection system for highest speed.
Parr a d i a b a + ic oxygen Bomb calori meters are designed for highest precision in calorific measure ments, y e t p e r m i t rapid tests with min imum calculations.
Booth:
MILTON ROY CO. 1300 E. Mermaid Lane Philadelphia IS, Pa.
No heat radiation c o r r e c t i o n s requir ed. Has Parr selfsealing oxygen com bustion bomb, either s i n g l e va Ive or double valve style.
I
Ask your Parr dealer for complete details or write direct t o the f a c t o r y for Spec. 1200.
PARR
INSTRUMENT COMPANY
MOLINE,
ILLINOIS
Circle No. 137 on Readers' Service Card
N A T I O N A L
A P P L I A N C E
WATER-JACKETED INCUBATORS
Emma Outside: 2 l " w . 24 "ά. 34 "h. Inside. 1 6 " w . 1 8 ' d . 2 6 ' h . 3 5 0 W a l l s . I 1 5 or 2 3 0 Volts A.C. Floor stand a v a i l a b l e : 21 V , " w . 2 2 % " d . 31 " h .
r~iâ National Appliance Co. 7634 S W. Capitol Hy. · Portland 19, Ore. Eastern Sales: H. Reeve Angel & Co., Inc. 9 Bridewell PI. · Clifton, N. J.
For exact exposures over long peri ods without variations in heat. Ideal for paraffin embedding. No fire hazard. Easy-cleaning, door-level floor. Three shelves adustable on Vi " cen ters. Additional shelves available. One inch water jacket surrounds floor, walls and top. Simple one piece filling tube, gauge glass and drain cock assembly. Heating elements be low jacket maintain constant tem perature. Polished copper walls and inner glass door. Rapid temperature recovery. Fiberglass insulated. Temperature from room to 65 C. within ± 0 . 3 " C , complete with thermometer, range minus 5 to 110° C. Protected by a double hy draulic Safety-Stat which prevents over-temperature damage. Write for bulletin or catalog of com plete N. A. line. N A T I O N A L
Circle No. 63 on Readers' Service Card
100 A
·
97,401
ANALYTICAL CHEMISTRY
A P P L I A N C E
Exhibiting: Booth 97: the Quantichcm analyzer, the Vibron pH electrometer, which is direct reading to ±0.002 pH units, and the Chemalyzer automatic colorimetric anlyzer for determining water hardness, chlorine residual, phosphate concentration or other water constituents colorimetrically. The Chemalyzer in strument has an accuracy of ± 3 % in the 0 to 3 p.p.m. range. It has an integral alarm circuit needed for monitor ing water softeners, chlorinators, and chemical feeders. Booth 401: the Chemalyzer automatic colorimetric analyzer, Serfass hydrogen purifier, Serfass mechanically refrigerated cold trap, the Versa pump, and the Milton Roy chromatographic miniPump. The hydrogen purifier uses a special palladium alloy that does such an excellent job of separating hydrogen from other gases that no trace of impurities can be found in the exit hydrogen. The Serfass cold trap provides temperatures down to —140° F. automatically without the use of in flammable or toxic liquids. The Versa pump can provide pressures to 100 p.s.i. or vacuums to 50 microns. With attach ments it will pull vacuums to 1 0 - 6 milli meters of mercury. It is a versatile laboratory apparatus with multiple uses. The chromatographic miniPump will meter chemicals at capacities to three ml./hr. with accuracies of ±0.10 milli liter. Representatives at Exhibit: John Procopi, John Mitchell, Evans Andreacola. General Product Line: Manufacturing en gineers of controlled volume pumps, chemical feed systems, relief and back pressure valves, process-stream analyzers, pH meters, gas purifiers and analyzers, and laboratory equipment. Booth:
103
MINE SAFETY APPLIANCES CO. 201 North Braddock Ave. Pittsburgh 8, Pa.
Exhibiting: Refractometer, Lira No. 300, MSA particle size analyzer, MSA DuraGrip nonskid floor coating. Representatives at Exhibit: N . W. Hartz, J. P. Sherwin, L. E. Maley, J. E. Gray, E. J. Condle, J. P. Strange, J. E. Zatek, G. B. Zuber. General Product Line: Gas analyzers, par ticle size analyzers, and process stream analyzers. Booth:
417
NRC EQUIPMENT CO. 160 Charlemont St. Newton 6 1 , Mass.
Exhibiting: Model 912 vacuum fusion gas analysis apparatus, Omegatron mass spec trometer, high vacuum pumps, ultra high vacuum gauge. Representatives at Exhibit: Raymond Yeaton, Peter Schwab, Sherwood Burnett. General Product Line: Complete line of high and ultra-high vacuum components, equip-
