How to encourage catalyst sprawl A glance through the micro scope shows why this inert catalyst carrier can hold so much active mate r i a l . T h e c a t a l y s t is spread on the avail able intricate surface which results in max imum amount of active material being exposed to reacting chemicals. Π Carborundum offers a com p l e t e line of i n e r t , c e r a m i c b o n d e d crystalline materials t h a t resist attrition. Select from: A wide choice
of materials including alumi num oxide, silicon carbide, silica, mullite. · A wide choice of shapes, por osities, structures. · A wide choice of sizes — f r o m p o w d e r to %-inch bonded granu lar pellets. Free test kit and brochure. A test kit w i t h s a m p l e s of m a n y types of material is avail able to users of catalyst carriers. Please write to us on your letterhead. Literature available on request. ®
CARBORUNDUM
RefractoriesDiv.,Dept.AC-6, Latrobe.Pa.
Photo shows fused aluminum oxide magnified 80 times. Circle No. 52 on Readers' Service Card
MULTiPLE-SPINDLE MAGNETIC STIRRER Eberbach Multiple Spindle Magnetic Stirrer POWER UNIT shown here gives you 4 stirring positions for greater capacity con stant speed magnetic stirring for tissue culture applications, fermentation studies and general purpose stirring. You can add 2 four position slave units and water baths in a building block concept giving a total capacity of 12 stirring positions. Variable speeds of 150 to 900 rpm. Measures 24" long, 16%" wide, 1%" high. For 115 volt, 60 cycle AC. Catalog No. 7605 $250.00 com plete with 4 vertical rods. Request Bulletin 690
P.O. BOX 1024
Eberbach
A N N ARBOR, MICHIGAN
CORPORATION
Circle No. 4 on Readers' Service Card 116 A
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ANALYTICAL CHEMISTRY
Circle No. 28 on Readers' Service Card -
