MANUFACTURERS' LITERATURE
FARRAND
sulfur recorders, micromanometers, and other equipment, as well as services, offered bv Consolidated Engineering Corp. {Bull. CEC-Î802A). 35 Rare Earth Oxides and Salts. Folder lists prices of rare earth oxides, acetates, chlorides, nitrates, and sulfates available from Research Chemicals, Inc. 36
HORNIG RATIO COMPARATOR Usable With All Types of Specfromefric Equipment Provides a means of determining directly the spec· tral transmission curve of a substance relative to that of a standard. Can be used independently or linked to other Spectrometric e q u i p m e n t for r a t i o measure • RESEARCH ments in the ultraviolet, visible • DEVELOPMENT or infrared regions. • " S I G N and Bulletin, N o . 812 upon request.
FARRAND OPTICAL CO., Inc. BRONX BLVD. & EAST 238th STREET NEW YORK 7 0 , NEW YORK
MANUFACTURE Of PRECISION , OPTICS "ECTRONICS . and SC '£MTIFIC '""RUMENTS
For further information, circle number 58 A-1 on Readers' Service Card, page 47 A
FOR
MORE EXACTING
LABORATORY REQUIREMENTS VITREOSIL® (Vitreous Silica) l a b o r a t o r y w a r e surpasses in effectiveness both porcelain and glass a n d in many cases is also an adequate, economical replacement for platinum.
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Superior to other cera mics because of its excep tional chemical purity a n d unusual resistance to heat shock, VITREOSIL today is an important, universally accepted m a t e r i a l for numerous analytical a p plications.
J mTREOSlUHj
Bulletin No. 18 with specifications and prices, sent upon request.
For further information, circle number 58 A-2 on Readers' Service Card, page 47 A
58 A
Alicyclic Compounds. Four-page brochure describes and lists properties of alicylic derivatives of cyclopentane and cj'clohexane supplied by Arapahoe Chemicals, Inc. 37 Process Instrumentation. Catalog of 12 pages briefly describes and illustrates line of instruments for measuring and controlling process variables, as well as contT'ol panels, data reduction and automation systems, chlorination equipment, and glass products. Fischer & Porter Co. (Cat. I). 38 Infrared Analyzer. Four-page folder describes recording plant stream analyzer for liquids or gases and its applications and operation. MinneapolisHoneywell Regulator Co. (Data Sheet 10.16-71). 39 Organolithium Compounds. Annotated bibliography, with two supplements, contains abstracts of research papers published prior to 1952 on the use of organolithium compounds in organic synthesis. Lithium Corp. of America, Inc. 40 Water Analysis Equipment. Twelvepage bulletin catalogs line of testing equipment, including titration stands, test sets, conductivity equipment, colorimeters, and photometers, for use in water analyses. W.II.&L.D.Betz. 41 Viscometers. Folder of 4 pages describes Cannon-Fenske and CannonUbbelohde viscometers, Cannon-Manning semimicroviscometers, and viscometer holders supplied by Cannon Instrument Co. (Bull. IS). 42 Ovens. Twelve-page catalog covers gravity and mechanical convection laboratory ovens and sterilizers, as well as incubators, water baths, controls, timers, and accessories. Modern Laboratory Equipment Co., Inc. (Cat. A). 43 Framing Cameras. Four-page folder describes two cameras capable of 1,200,000 and 2,400,000 frames per second, respectively, and designed for studies of combustion, corona discharge, plastic and elastic deformation, and shock wave phenomena. Beckman & Whitley, Inc. (Form 189). 44 For further information, see coupon on page 47 A ANALYTICAL
CHEMISTRY
