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Product Capsules
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RECORD-A-WEIGH Shows Instantaneous Weight and of
Rate
Change
This new laboratory instrument com bines the range and accuracy of the Ainsworth Analytical Balance with a continuous record and automatic operation. Records weight changes for long or short periods on a chart 1 1 " wide representing 110 mg. Accuracy and readability are plus or minus 1/10 mg. Capacity 200 grams. Automatically adds or subtracts weights as required to rescale re corder pen. Range of automatically controlled weights is 4 grams. This is 40 chart widths —and the record ing is linear all the way. Samples can be placed on the balance pan or suspended in a controlled environment, above or below the balance.
Research and development of new instruments like this, are made possible by your purchase of products
"MADE
IN
U.S.A."
eludes many graphs. The Harshaw Chemical Co., 1945 E. 97 St., Cleveland 6, Ohio. 14A-2 Densitometers. Bulletin available ou photoelectric instrument for the evalu ation of strips and sheets of filter paper in partition chromatography and paper electrophoresis. Photovolt Corp., 95 Madison Ave., Ν. Ύ. 16, Ν. Υ. 65Α-2 Determinators, Sulfur-Carbon. Bul letin provides complete information on combined sulfur-carbon determinator for small volume laboratory. Lindberg Laboratory Equipment Div., Lindberg Engineering Co., 2440 W. Hubbard St., Chicago 12, 111. 95A-1 Dryers-Calciners. Circle 26A for bulle tin, "Research and Pilot Plant Equip ment for Drving and Calcining." The C. O. Bartlett & Snow Co., 6210 Har vard Ave., Cleveland 5, Ohio. 26A Electrobalances. Bulletin available on portable electrobalance cited as be ing immune to its environment. Weigh ings average less than a minute. Range of sample weight: 0-5, 0-10, 0-20, 0-50 mg. Aloe Scientific, Div. A. S. Aloe Co., 5655 Kingsbury, St. Louis 12, Mo. 86A-1 Electrometers. Circle 21A for full specifications including typical biolog ical applications of the new "Dynacon" electrometer, a system for measuring C 14 , H 3 , and S 35 in gases, liquids, solids. Nuclear-Chicago Corp., 251 W. Erie St., Chicago 10, 111. 2IA Electronic Relays. Characteristics of electronic relay model #4 include : load current, 35 amps. 115 volt AC; control voltage, 7 volts DC open circuit; con trol current, 2 microamps DC closed circuit, The Emil Greiner Co., 20-26 N. Moore St., N. Y. 13, Ν. Υ. 54Α Electronic Tubes. Company announces ''Project Info" for users of electronics. Circle 52A for complete details. Radio Corporation of America, Electron Tube Div., Harrison, N. J. 52A Filter Papers. Circle 17A for ana lytical filter paper sampler, filtration chart, "Quick Reference" catalog and bulletin on chromatography and elec trophoresis. Carl Schleicher & Schuell Co., Keene, Ν. Η. Ι7Α Fluorimeters. Klett fluorimeters are designed for the rapid and accurate determination of thiamin, riboflavin, and other substances which fluoresce in solution. Klett Mfg. Co., 179 E. 87 St., Ν. Υ., Ν. Υ. 43Α-2 Fraction Collectors. A versatile col lector designed as an assembly of sepa rately available sub-units. Each tube Circle
WM. AINSWORTH & SONS, INC.
rack enables 24 tubes to be simultan eously loaded or removed for batch processing. Time and volume con trolled collection. LKB-Produkter, Fabriksaktiebolag, P. O. Box 12035, Stockholm 12, Sweden. 85A Gas Chromatography. GC-22 is cited as being the first column support material engineered to meet gas chromatography specifications. Mois ture less than 3%. Coast Engineering Laboratory, 16-14th St., Hermosa Beach, Calif. 88A Gas Chromatography. Designed for the research chemist, the "Aerograph" is cited as being fast, accurate, versa tile, compact, inexpensive. Wilkens In strument & Research, Inc., Walnut Creek, Calif. 89A-3 Glass Apparatus. Circle 75A-2, for catalog containing 9,000 different pieces of "Pyrex" glass apparatus. Special Apparatus Section, Corning Glass Works, 69-4 Crystal St., Corning, Ν. Υ. 75A-2
Glass Filter Ware. Circle 24A for brochure on sintered glass filter ware: crucibles, discs, tubes. Ace Glass, Inc., Vmeland, N. J. 24A Glassware. Kontes functionally de signed outer ground joints have heavy top beading, thick, high-strength walls, and no external ridges or bulbs. Kontes Glass Co., Vineland, N. J. 70A Glassware. Circle 58A for catalog on "Lab-Crest" stopcock-equipped burettes, separatory funnels, chroma tography columns. Stopcock eliminates lubrication and freezing. Fischer & Porter Co., 1548 County Line Rd., Hatboro, Pa. 58A Glassware. New, 348-page, colorcoded catalog lists 485 new "Pyrex" items. Circle 7A for copy. Corning Glass Works, 72-4 Crystal St., Corning, Ν. Υ. 7Α Glassware. "Kimax" graduated and ungraduated laboratory ware is made from KG-33 borosilicate glass and is cited as being unruffled by thermal shock, hard knocks, chemical attack. Owens-Illinois, Toledo 1, Ohio. IBC Glassware. Circle 81A for 16-page, 2color booklet explaining in detail the economics involved in purchase of labo ratory glassware. Doerr Glass Co., Vineland, N. J. 81A Glassware Cribs. Bulletin on new seal-crib for glass tubing that can be stacked, hung on wall, or suspended from ceiling. Bethlehem Apparatus Co., Inc., Hellertown, Pa. 34A-1 {Continued on page 92 A)
No. 91 A on Readers' Service Card, page 85 A
VOL.
30, NO. 5, MAY 1958
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91 A
