This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: ... with Canada's four-years'-of-war cripples back in the country, the problem of prior disability in relation to subsequent compensation has not become acute nor pressing to the Ontario compensation board. Pennsylvania has a record of 42,111 employment openings in that state for its soldiers, sailors, and marines who may return disabled by war service, and it is understood no question of increased compensation liability has become apparent. High Explosive Shells and Shrapnel Description of How Shells are Heat Treated--Physical and Chemical Requirements Given--Heating of Steel for Forgings Discussed--Forging Most Important Feature in Production. By J. M. HALL. Superintendent, Hamilton Steel Wheel Co., Hamilton, Can. The information I am giving is taken from the heat treating of 18 pound British shrapnel, making steel blanks for 4.5 inch British howitzer shells and making the steel and forging the British 6, 8 and 9.2 inch high explosive shells, our present output being over 10,000 tons of finished steel per month. I will not discuss the machining of any of these shells, as in writing this paper I only intend to cover the handling of the steel up to where the required physical requirements are obtained. The 18 pound British shrapnel is forged from banks cut from 3j4 inch plain rolled steel bars, the analysis being: Carbon 48 to.60 Manganese SO to 1.0 Silicon under.30 Phosphorus under.06 Sulphur under.05 The elastic limit of the bars is 19 long tons with an ultimate breaking strength of at least 35 tons and an elongation of 20 per cent in 2 inches. After being pierced and drawn there are no strict physical requirements as the forgings must be heat treated to meet the specifications in the finished shell, which are a yield point of 36 long tons, an ultimate break...