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PLAINTIFFS EXHIBIT Ql'byi.QCN I 85% MAGNESIA INSULATION MANUAL Published by THE MAGNESIA INSULATION MANUFACTURERS ASSOCIATION Washington, D.

Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL-- decision* and trend* AUGUST, 1948 (VoL 12, No. 8) INDUSTRIAL HYGIENE FOUNDATION 4400 FIFTH AVENUE PITTSBURGH 13, PA.

Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL - - - decision* and trends MARCH. 1949 (Vol. 13.

TABLE OF CONTENTS October 15, 1944 Number 10 ABSTRACTS Section ^1 Clay Products': j^tones-- ...........

m* lan be- ,/J. p good o train Jinique. iron and one the s start- sontrob Human Mining Section Executive Committee 1944-1945 General Chairman--C.

PLAINTIFFS EXHIBIT Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS ?

HEATING VENTILATINC AIR CONDITIONING CUIDE 1944 Table 2.

HEATINC VENTILATINC AIR CONDITIONING CUIDE 1944 general class can be made to perform the same duty, although mechanical difficulties, noise or lack of efficiency may limit the use to one or another type.

HEATINC VENTILATING AIR CONDITIONING GUIDE 1944 mum design safety factors, and this necessitates unusual attention to design details.

HEATING VENTILATING AIR CONDITIONING CUIOE 1944 _.

172 ' Chapter 8 1945 Guide _. i v water or-air.- The~Bureau of^Mines' Report oflnveshgationsrNo: 3272* shows that the loss of seasonal efficiency is not so great as has been believed and usually is not over 6 per cent because the greater part of the heat is transmitted through the combustion chamber surfaces.

186 Chapter 9 1945 Guide volume of. water vapor in the'flue products from natural or coke oven gas. is about twice the volume of carbon dioxide.

284 Chapter 14 1945 Guide Dirt pocket Fig. 35.

306 Chapter 16 . 1945 Guide wrought pipe.