July 12, 1918. THE COLLIERY GUARDIAN. 61 By Tests The Best RESULT OF LATEST TRIAL INCREASE IN EVAPORATION “PERFECTA” BOILER CIRCULATOR Ltd., 39, Victoria Street, LONDON, S.W. 1. FT bjb >JL MAKERS OF ALL CLASSES OF . . . Telegrams : “ Smedley, Ironville.” Telephone: No. 67, 68, & 69, Ripley. Designed to comply with the Coal Mines Act, 1911, and to facilitate loading. Can be Readily Fixed to Existing Trams. & Girders Hydraulically Cold Straightened. I ■ ■ M • I ■ ■ ■ ■ ■ ---: PIT TRAM AND WAGON WORKS - Codnor Park, ALFRETON OPEN. CLOSED. COLLIERY OWNERS and MANAGERS are invited to send for particulars of