MEASUREMENT MUST PRECEDE CONTROL
Product Capsules Filter Papers. Circle 91 for sampler containing quantitative and qualitative grades plus a chromatography sampler kit, Carl Schleicher & Schuell Co.
Na Κ Ca
Measure all 3 quickly, easily, accurately with a
COLEMAN FLAME PHOTOMETER
91
Filter Papers. Samples of 3 new glass fiber Whatman papers and brochure from H. Reeve Angel & Co., Inc. 122 Filters. Info on Schott narrow band interference filters for 390-1200 πΐμ. Fish-Schurman Corp. 53 Filters. Sample and catalog on mem brane filter applications from Millipore Filter Corp. 75 Fluorimeters. Klett Mfg. Co. fiuorimeters determine thiamin, riboflavin, and other substances. 63-2 Fraction Collectors. Info from LKBProdukter on "RadiRac" automatic collector for drop count, volume, and time operation. 68 Fractometers. Golay column-ionization detector system increases range and precision of 154-C vapor tactom eter. Info from Perkin-Elmer Corp.
More than 10,000 soil samples per year are measured for sodium, potassium and calcium by an industrial laboratory with one Coleman Flame Photometer. N o similar instrument can carry so great a work load . . . certain proof that the Coleman requires very little instru ment manipulation and a minimum of sample modification. Sample measurement in the Flame Photometer is so simple that highly precise data can be ob tained from direct-reading scales by lab assist ants "trained-on-the job." The Flame Photom eter uses ordinary city gas and its atomizerburner and sample handling system are sturdy, precise and foolproof. To sum it up—there just isn't any faster or easier way to measure quan titatively these 3 important elements. A Coleman Flame Photometer costs surprisingly little for the amount of work it can do. Find out how it can help in your lab . . . write for Bulletin B-242.
COLEMAN INSTRUMENTS COLEMAN INSTRUMENTS, INC., DEPT. A, MAYWOOD, ILL. Circle No. 30 on Readers' Service Card 102 A
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ANALYTICAL CHEMISTRY
162
Furnaces. Bulletin from Lindberg En gineering Co. on new electric lab box furnace. 115 Furniture. Catalog and "Planning Kit" from Laboratory Furniture Co., Inc. on interchangeable steel modules. Hot Plates. Catalog from Thermo Electric Mfg. Co. on hot plates from 6" X 6" to 12" X 24". °5 Ion Exchange Resins. Info from Rohm & Haas Co. on analytical grade "Amberlite" resins. 89 Kjeldahl Apparatus. Info from Lab oratory Construction Co. on Kjeldahl apparatus, titration units, acid and caustic dispensing units. 136-1 Lab-Jack. Info from Central Scien tific Co. on new 3 " X 3 " jack. 127 Marking Pencils. Circle 30-1 for sample of laboratory marker, and 30-2 for mechanical pencil. Blaisdell Pen cil Co. 30-1,2 Melting Point Apparatus. Data from Arthur H. Thomas Co. on capillary melting point apparatus with periscopic thermometer reader. 97 Microscopes. Catalog on Unitron's polarizing microscope from United Sci entific Co. 24 Microscopes. 32-page brochure on Bausch & Lomb stereoscopic micro scopes from Will Corp. 108
