Technologic Papers of the Bureau of Standards

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The nine specimens, one from each Of the steels in both the B. O. H. And A. O. H. Series for each heating, were fastened three in a row to a piece Of rather coarse iron Wire gauze, which was wrapped around the pyrometer tube at the closed end in such a way that the' three rows of specimens-were placed approximately equidistant around the outer circumference Of and in contact with the pyrometer tube and also so that the hot junction of the chrome] alumel thermocouple, used in conjunction with a millivoltmeter, was approximately centrally located within the cluster of the nine specimens.