Roles

Advertisers' Index
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Aeroil Products Co. 12
Anchor Manufacturing Co. 14

C
Chim-A-Lator Co. 16

D
Deal Products, Inc. 15

E
Robert G. Evans Co. (Target) 2nd Cover

New "Hot Box" Measures Heat Transfer
A new $100,000 test facility at the Portland Cement Association's research complex in Skokie, Ill., will permit PCA researchers to determine the heat transmission characteristics of building walls constructed of d