WAVELENGTH REJECTION FROM X-BAND TO X-RAY
MONO PASS INTERFERENCE FILTER SETS
Optics Technology offers filter sets cov ering the range of 400 millimicrons to 1.75 microns to meet your requirements in spectral analysis. These MONOPASS interference filter designs reject from X-band to X-ray! The possibility of spuri ous results is eliminated as only the de sired wavelength is passed. Calibration curves for each filter pinpoint accuracy. The curves for each set are laminated in plastic and bound in a rugged volume. Visible Spectrum Set 10A* includes ten MONOPASS filters to isolate principal lines as K, Ca, Hg, etc., from 706 millimi crons to 404 millimicrons, important in flame chemical analysis. Four neutral density filters and a linear spectral "wedge" filter are included. Price, $325. Visible Spectrum Set 12A* includes ten MONOPASS filters uniformly spaced from 400 millimicrons to 700 millimicrons, as well as four neutral density filters and a linear spectral "wedge" filter. Price, $325.00. Infrared Set 15A includes ten MONOPASS filters spaced at every 0.1 micron between 0.8 micron and 1.75 microns. Price, $450. Infrared Set 20A includes ten interfer ence filters on 1 " diameter substrates spaced at every 0.1 micron between 1.75 microns and 2.75 microns. These filters are blocked out to 3.2 microns on the long end and to X-ray on the short end. Price, $450.00. * Distributed Central
through
Scientific
Company
OPTICS TECHNOLOGY, INC 248 Harbor Boulevard . Belmont, California LYtell 1-0358 (Area Code 415) 7M, Circle No. 159 on Readers' Service Card
MANUFACTURERS' LITERATURE
INSTANT THOROUGH MIXING! pH Equipment. Illustrated eight-page bulletin describes various instruments for p H measurements and titrations. Includes equipment for pH stat, re cording titrations, and pH meters for research and control. Brinkmann In struments, Inc. 1-20
VERSATILE
VORTEX JR. MIXER
Temperature Programmer. Six-page illustrated bulletin describes the ThermotraC unit for use with any labora tory chromatograph. Includes sche matic diagram, illustrative charts, and specifications. Beckman Scientific and Process Instruments Division (Bull. 792). L-21 Air Pollution Analyzers. Illustrated bulletin describes the Acralyzers for monitoring oxidants, oxides of nitrogen, and sulfur dioxide in the atmosphere. Diagram and specifications. Beckman Scientific and Process Instruments Divi sion (Bull. K-40SS). L-22 High Vacuum Vapor Pumps. This 56page illustrated booklet covers metal oil pumps, metal mercury pumps, glass oil pumps and mercury pumps, special pumps and systems, adapters, and pump fluids. Has section on pump selection, as well as others on high vacuum and the performance charac teristics of vapor pumps. Includes many charts and tables. Consolidated Vacuum Corp. (Bull. 6-1). L-23
Convenient Efficient Mixing Just hold the tube or other vessel in yovr hand...press it against the revolving neoprene cup. A vortex forms at once for immediate mix ing action!
Γ j
; ι
N o Stoppers . . . N o Rods N o Finger Capping Saves time and enepgy. For use whenever • quick mix is called for . . . works well with any shape vessel. • Test tubes . . . micro to 4 0 m m . • Centrifuge tubes . . . a l l sizes • Florence or Erlenmeyer flasks . . . small size • Square or s p e c i a l l y - s h a p e d tubes
t
Asie yavr laboratory supply dialer tor detail», or write directly to: SCIENTIFIC INDUSTRIES, INC. Booth 93, N . I . H . Exhibit B e t h e s d a , M d . Oct. 10-13
AT LAST! A REALLY CONVENIENT
Catalog. Four-page illustrated peri odical publication covers various items for the laboratory. Chicago Apparatus Co. (CA Newsletter, April 1961). L-24
AUTOMATIC SYRINGE ATTACHMENT
Glassware. Brochure supplements company's Catalog LG-2, listing price changes and showing 45 new additions to the Pyrex line. Corning Glass Works (Supplement No. S). L-25
REPEATS PRESET VOLUME • Assembles inslaiitly • Sellinjj locks in place • Available to fit standard syringes In 1/4, 1, 2, 5-10 cc. anil 10-50 or 100 microliters
Dosimeter Converter. Leaflet de scribes an accessory for converting any of the company's standard Fluorometers to a means of reading dosage of ionizing radiation. Specifications and uses are included. G. K. Turner Asso ciates. 1-26
EASY TO HANDLE Fine-thread adjusting screw permits accurate setting to any volume . . . comes apart or reassembles with a slight twist without changing the setting. Any syringe becomes an AUTOMATIC PIPETTE with this simple new attachment.
Gradation Equipment. Four-page leaflet describes a sieve shaker, stand ard sieves, portable sieve sets, sample splitters and quartering canvas, and a variety of balances for gradation work. Testlab Corp. t-27 η-Butyl Alcohol. Twelve-page book let covers such things as properties, company specifications, specific gravity, vapor pressure, viscosity, surface ten sion, binary and ternary azeotropes, applications, and reactions. There is also a reference list. U.S. Industrial Chemicals Co. L-28
Ask your laboratory supply dealer, or write directly to:
Scientific Industries, Inc. Dept. AC-9, 15 Park Street Springfield 3, Massachusetts Circle No. 97 on Readers' Service Card
VOL.
33, NO. 10, SEPTEMBER 1961
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