PITTSBURGH EXPOSITION
flow controllers, ELF needle valves, low flow meters. BURRELL CORP. 2 2 2 3 Fifth Ave. Pittsburgh, Pa. 1 5 2 1 9
Exhibiting: Gas chromatographs and accessories including pyrolyzer; wristaction shaker; instruments and solutions for gas analysis; instruments for rheology (rheometers, gelometer, thermal incline) ; Stanton laboratory balances including analytical, micro, thermal recording balances. CAHN INSTRUMENT CO. 1 5505 Minnesota Ave. Paramount, Calif.
Exhibiting: Vacuum balances and micro balances for TGA, adsorption studies and magnetic susceptibility; ultra-micro balances for elemental analysis and biochemistry; accessories for specific gravity and particle size measurement by sedimentation; automated balances. CANAL INDUSTRIAL CORP. 4 9 3 5 Cordell Ave. Bethesda, Md. 2 0 0 1 4
Exhibiting: Coulachron automatic titrator, wide-track 85 ultraviolet flow analyzers, Model M ultraviolet-visible spectrophotometer, back-track recorder-programmer, other equipment for instrumental analysis and research. CARLE INSTRUMENTS, INC. 532 South Rose St. Anaheim, Calif.
Exhibiting: Model 101 micro detector systems, solution fraction collector, pellet fraction collector, heated micro flow cell for GC-IR, complete line of sampling and switching valves, on-column inlets and other GC-IR innovations. COLEMAN INSTRUMENTS, INC. 42 Madison St. M a y w o o d , III. 6 0 1 5 4
Exhibiting: Complete new UV-visible spectrophotometer line including single beam, double beam ratio recording, research and routine typo; complete new pfl meter and electrode line including expanded scale, null balance, research and general purpose type pH meters; complete line of automated elemental analyzers for determination of nitrogen, carbon, hydrogen, oxygen.
FISHER ENDS CONTROVERSY VS. ATOMIC ABSORPTION WITH
EMISSION LOW-COST
MODEL EEL-140 Zinc in a flame at 2 0 0 0 ° K has seven light-emitting atoms but a thousand million million (10 1 5 ) light-absorbing atoms. The amount of light absorbed is proportional to the concentration of the absorbing element. This sensitivity alone demonstrates the superiority of atomic absorption spectrometry over emission methods for trace metal analyses. Consider, too, these facts about the new Model EEL-140 Atomic Absorption Spectrophotometer distributed by Fisher Scientific. · Simple to operate. · Determinations can be made in less than 15 seconds. · 100 determinations an hour of the same element are easy, with precision better than 1 % of the amount present. · Changing to another element can take less than 3 0 seconds. · Direct reading scale. · Compact, self-contained. At $ 2 , 8 5 0 , not including hollow cathode tubes, the Model EEL-140 costs far less than comparable instruments. This brings it within reach of analysts in agriculture, oil refining, quality control, mining, geology, clinical chemistry, forensic medicine and industrial toxicology. For free Bulletin 14-380, plus data on Atomic Absorption Standards, write Fisher Scientific Co., 100 Fisher Building, Pittsburgh, Pa. 15219. J-504
F CONSOLIDATED ELECTRODYNAMICS CORP. 3 6 0 Sierra Madre Villa Pasadena, Calif.
OVER NEW,
FISHER SCIENTIFIC CO. Instruments, Apparatus, Furniture and Chemicals for Laboratories
Complete stocks in all these locations: Atlanta · Boston · Chicago · Cleveland · Houston · New York Philadelphia · Pittsburgh · St. Louis · Union, N. J. · Washington · Edmonton · Montreal · Toronto · Vancouver See Buyers' Guide for all products/sales offices. Circle No. 92 on Readers' Service Card VOL. 38, NO. 2, FEBRUARY 1966 • 107 A
