Product Capsules Moisture
Ter,ring
Equipment.
Catalog available; that illustrates and describes complete line of DietertDetroit moisture testing equipment, including moisture tellers, speed ovens, speed desiccators and accessory items for research, analysis and control work. Harry W. Dieteri, Co., 9330 Roselawn, Detroit 4, Mich. 81A-2
progress in p o l a r o g r a p h y ·${ Speedy, direct or derivative operation. •^f Direct reading from scale eliminates geometrical construction. •jf Greater resolution due to formation of Peaked Polarograms. •jç P o l a r o g r a m s r e p r o d u c e d every seven seconds. ·}{ Increased sensitivity enables accurate determinations at concentrations of fractions of a microgram per millilitre.
with the cathode ray POLAROTRACE* you have (he ultimate in Polarographir techniipie, without undue complexity of control. Suitable lor research or routine, it is supplied complete with ils Electrode Stand which includes a thermostaticallycontrolled lank, provision lor simultaneous degassing of the three cells and easy means of raising and lowering the electrode in the solutions under test. Camera attachments are also available. * Trade
Mark
Wrile for brochure 101 and on your own problem.
advice
SOUTHERN INSTRUMENTS COMPUTER DIVISION, CAMBERLEY, Cables :
Minrak,
SURREY,
ENGLAND
Camberley.
England
1'Ol.AROTIiACE -another rxunuili' ol
sindak
Service to research and industry Circle No. 70 A en Readers' Service Card, page 77 A
70 A
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ANALYTICAL CHEMISTRY
O v e n s . Complete specifications available on "Thermo-Vac" ovens for lowpressure drying down to 1 micron. Range: room to 200° C. ± 0.5° C. Constructed of welded steel. Chamber size: 8" X 8" X 12". Overall size: 12" X 17VY' Χ 1 3 3 / / . 2" thick fiberglass insulation. Schaar and Co., 754 W. Lexington 8t., Chicago 7, 111. 14A pH Meters. Detailed information available on the following Beckman pH meters: pocket, "Zeromatic," model N-l, model GS, model G, and model N-2. Harshaw Scientific, Div. of the Harshaw Chemical Co., 1945 East 97th St., Cleveland 6, Ohio. 3rd Cover pH Meters. Bulletin available on the Beckman "Zeroriatic." Instrument features push-button control, is driftfree, provides millivolt range, needs no warm-up time, arid has mirror-backed scale. Scientific Glass Apparatus Co., Inc., Bloomfield, N. J. 25A-1 pH Meters. Bulletin available on company's complete line of battery and line-operated pli meters incorporating modern electronic tubes and circuits. Simple in operation and' maintenance, ' featuring sealed amplifier plug-in units. Photovolt Corp., 95 Madison Ave., N. Y. 16, Ν. Υ. 23Α-1 Photometers. Complete information available on the new Brice-Phoenix Universal light scattering photometer that measures absolute turbidity, dis symmetry, depolarization, and molec ular weight. Phoenix Precision Instru ment Co., 3803-05 No. Fifth St., Phila. 40, Pa. 38A-1 Pipettes. Complete information avail able on the new Pyrex brand "AccuRed" pipettes cited as being chemically stable, corrosion resistant, low cost, and accurately calibrated. Has per manent red graduations. Arthur H. Thomas Co., Vine St., at 3rd, Phila., Pa. 58A Platform Discs. Information available on company's new high-density platform disc designed for nesting light oils and other materials where minimum pene tration of the sample into the electrode is desired. National Carbon Co., Div. of Union Carbide & Carbon Corp., 30 East 42nd St., Ν. Υ. 17, Ν. Υ. 28A
Polarimeters. Circle 26A-I for in formation on the standard Model D Keston polarimetric units for attach ment to Beckman DU spectrophotom eter for photoelectric polarimetry. Sensitivity: 0.0015°. Rotations linear with optical density scale readings. Standard Polarimeter Co., 6 Banta PL, Hackensack, N. J. 26A-1 Polarimeters. Detailed literature available on newly designed polarim eter reading to 0.01°. Inclined ob servation telescope permits readings from sitting position. Direct verier readings can be estimated to 0.005°. Carl Zeiss, Inc., 485 Fifth Ave., Ν. Υ. 17, Ν. Υ. 37Α-1 Pollution Control Instruments. Circle 67A-1 for bulletin on company's Universal anemometer that reads wind velocity in kilometers per hour, miles per hour, or knots. Also available is bulletin on company's water current and level instruments (circle 67A-2). W. & L. E. Gurley, 523 Fulton St., Troy, N . Y . 67A-1, 2 Presses, Hydraulic. Catalog avail able providing applications of company's 4-column design hydraulic laboratory press. 7" stroke. Presses from 3 to 50-tons. Wabash Metal Products Co., 1556 Morris St., Wabash, Ind. 7 2 A - 1 Pressure Regulators. Catalog avail able. Includes information on com pany's complete line of precision tested automatic pressure regulators, gases, special custom mixtures, valves, and accessories. The Matheson Co., Inc., East Rutherford, N. J. 86A-1 Pumps, Bottle. Bulletin available on company's "Ventgard" bottle pump that pumps out distilled water while permitting only purified air to enter. Filters particulate matter as small as 0.2 micron. Barnstead Still & Demineralizer Co., 9 Lanesville Terrace, Boston 31, Mass. 63A-2 Pyrometers. Bulletin available on company's light weight, portable surface pyrometers for measuring temperature of mold cavities and flat surfaces, still or moving rolls, and within-thc-mass tem perature of materials in a plastic or semi-plastic state. Cambridge Instru ment Co., Inc., 3514 Grand Central Terminal, N. Y. 17, Ν. Υ. 41Α-1 Quantometers. Kit of details and in formation available on company's unit that provides production quality control spectrochemical instrumentation. Up to 30 elements can be determined, 15 at any one time, with manually con trolled push button readout. Applied Research Laboratories, 3723 Park PL, Glendale8, Calif. 65A (Continued on page 71 A)
