PITTSBURGH EXPOSITION
GREATER ACCURACY-VERSATILITY
Electrothermal ®
MARK II
MELTING POINT APPARATUS TEMPERATURE RANGE: 20° to 360° C
Exhibiting: Fiberglass laboratory fume hoods and equipment, fiberglass glove boxes and tissue culture hoods.
C O L E M A N INSTRUMENTS CORP. 4 2 M a d i s o n St. M a y w o o d , III. 60154
Exhibiting: UV-VIS-NLR spectro photometers (complete line of double beam and single beam spectropho tometers) ; complete pH meter and electrode line plus automated N 2 , C/H, and 0 2 analyzers. CONSOLIDATED ELECTRODYNAMICS CORP. 3 6 0 Sierra M a d r e Villa Pasadena, Calif. 91109
Exhibiting: 22-101 Direct reading emission spectrometer and 21-104 or ganic chemist's mass spectrometer.
MARK II Advanced Model as described
$
295
COORS PORCELAIN C O . 6 0 0 N i n t h St. G o l d e n , Colo.
MARK I Standard Model without fine temperature control and instant heat booster
*240 OPERATION: Uses established tech nique of melting samples at the bot tom of vertical capillary tubes. Up to three samples are placed in the shielded low heat capacity metal block, illuminated and viewed through a deep fixed focus lens. MELTING POINT BLOCK: Central vert ical hole receives the thermometer, and three holes equidistant from ther mometer bulb receive the capillary tubes. A borosilicate glass surrounding sleeve eliminates air currents. HEATING: The heating element yields i n f i n i t e l y v a r i a b l e rates of heating through coarse and fine control. A press button booster can over-ride the controls for maximum heat input when required. ILLUMINATION AND VIEWING: Light from two lamps is directed into block for maximum clarity with minimum glare. THERMOMETER: Specially designed to achieve the accuracy required over the entire range of 20° to 360° C. Spe cially-treated glass virtually eliminates risk of zero migration. Immersion of thermometer in block has been stand ardized at 34 mm. and allowance made for emergent stem during calibration. Write for full information and name of your local dealer
ELECTRO-THERMAL SALES CORP. Dept.
A, 300 Northern Boulevard Great Neck, N.Y. 11021 Phone 516-466-8218
Circle No. 1 on Readers' Service Card 78 A
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ANALYTICAL CHEMISTRY
C O R N I N G GLASS W O R K S B u i l d i n g 8 , 4 t h Floor Corning, N . Y . 14830
Exhibiting: Complete line of pH equipment, including meters, electrodes, and accessories, with line of specific ion electrodes; water distillation units; hot plates and stirrers including remote control units; porous glass for thin layer chromatography; and complete line of Pyrex, Corex, and Vycor brands of laboratory glassware. COULTER ELECTRONICS INDUSTRIAL DIVISION 2 6 0 1 N. M a n n h e i m Rd. Franklin Park, III. 6 0 1 3 1
Exhibiting: Particle size analyzers for size distribution and concentration between 0.5 and 800 microns; Model Β industrial Coulter counter; and Model M data reduction accessory. C R A W F O R D FITTING CO 2 9 5 0 0 Solon Rd. Solon, Ohio 44139
Exhibiting: Swagelok tube fittings and other hydraulic and pneumatic components featuring Swagelok tube fitting connections. CRESCENT M A N U F A C T U R I N G C O . 1 8 3 9 South P u l a s k i R d . Chicago, III. 6 0 6 2 3
Exhibiting: Wig-L-Bugs Models 3A5A and 6000 for small sample mixing, uniform particle size reduction in chem istry, metallurgy, and spectroscopy.
W . H . CURTIN & C O : P. O . B o x 1 5 4 6 Houston, Texas 77001
Exhibiting: Instruments Inc. gas chromatographs ; Curtin column pack ings; spectrophotometers; pH meters; ion electrodes; balances; recorders; and reagent chemicals. DISTILLATION PRODUCTS INDUSTRIES 7 5 5 Ridge Road West Rochester, Ν . Υ . 14603
Exhibiting: Eastman organic chemi cals, some 4900 different organic chemi cals for research, analysis, and produc tion; Eastman chromagram system for thin layer chromatography, prepared sheets and developing apparatus. D O H R M A N N INSTRUMENTS C O . 1 0 6 2 Linda V i s t a A v e . M o u n t a i n V i e w , Calif. 94040
Exhibiting: Recording microcoulometric titrating system specific for ni trogen, halide- and sulfur-bearing com pounds; gas chromatographic potentiometric recorders; and other labora tory recorders. E. I. d u P O N T d e N E M O U R S & C O . , INC. Wilmington, Del. 19898
Exhibiting: Du Pont 900 modular thermal analysis system featuring Model 900 differential thermal ana lyzer, the 940 thermomechanical ana lyzer, the 950 thermogravimetric ana lyzer and high temperature DTA modules for 1600° C operation; Model 310 curve resolver, a computer system to resolve overlapping peaks in plotted analytical data; Model 510 moisture analyzer for moisture analysis in a range from 0-25,000 ppm. D U R R U M INSTRUMENT C O R P . 9 2 5 E. M e a d o w D r . Palo A l t o , Calif. 94303
Exhibiting: Prism-grating spectro photometer, Model PCS, with double monochromator and 180 to 1000 ταμ wavelength range; Durrum-Gibson stopped-flow spectrophotometer for rapid kinetic studies; and DurrumJasco spectropolarimeter for measure ment of circular dichroism and optical rotatory dispersion. EASTMAN K O D A K C O . 3 4 3 S t a t e St. Rochester, Ν . Υ . 14650
Exhibiting: A broad range of sensi tized materials applicable to all scien tific photographic techniques.
