| Show covering for underground steam pipes tho the industrial world quotes the following from a well known engineer of important copper mines Tor meily it was a custom at the mines milles to bury and cover io in steam pipes underground without any lion con co er and then the loss was ellerm enormous ous but dow the pipes are arc comred wit with ha a layer of plaster of paris pans aud and sawdust saw dust 2 inches thick 1 part of the plaster il aster to io 2 3 of 0 tile the satt dust and then when so 50 covered condensation nearly dearly ceases benses or is only WO to 1 ot of what it was before gypsum ara and sawdust aro are both cheap and the plan is worth a trial but we would expect tie no such effect from its use usei Ind industry does doea sma smoke ic indicate waste tho the supposition that smoke indicates great waste ii denied by ina M kestner w lose hose careful exic experiments are stated to show that smoke is made ns as dense asp us possible isible the loss of combustible corn material is less than 1 per cent to keep smoke at a minimum ho be le commends a suitable mechanical ch cli anical stoker or provision tor for mixing tho the k ith h lot hot gases |
