bath to be kept below its ture with about half its volume proper temperature. Only pure of air by means of a meter mixer, lead should be used to obtain so that the total quantify of the full heat for hardening good stored gas available—of a qual- tool steel. A mixture of lead and ity equal to good… … Circuit. FOR LIGHTHOUSE OTS FIRTH OF CLYDE, SCOTLAND. chanical World and Steam User^ Recent and very satisfactory Journal, will be situated at a trials have, we understand, been considerable distance from the new lighthouse and engine 'owned and operated by the St. Louis Wood Preserving Com- made…
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