Mechanical Contracting & Plumbing January-December 1908 . r permitted to goout in freezing weather. Fan furnace plants along the linesherein outlined will give very good re-sults as to efficiency and economy. Verymany of these heating systems will beinstaled. I ask for them more study andengineering skill than they have had inthe past. The field for improvement isalmost unexplored. Tiie internal combustion engine isIapidly supplanting the steam engine. Itmay well be that we will see the daywhen the direct acting air heater shallsupplant the steam boiler and coils. I have attempted briefly to d
Mechanical Contracting & Plumbing January-December 1908 . r permitted to goout in freezing weather. Fan furnace plants along the linesherein outlined will give very good re-sults as to efficiency and economy. Verymany of these heating systems will beinstaled. I ask for them more study andengineering skill than they have had inthe past. The field for improvement isalmost unexplored. Tiie internal combustion engine isIapidly supplanting the steam engine. Itmay well be that we will see the daywhen the direct acting air heater shallsupplant the steam boiler and coils. I have attempted briefly to describethe simplest steam plant, with its near-est parallel, the most complicated fur-nace plant. Apparently they are growing nearertogether, and we may hope that the bestapparatus of the future will combine themerits of the two types without any oftheir faults. Torontos June building permits were$1,055,405, as against $1,445,230 a yearago. The permits numbered 2,605,against 2,024 in June last year. I Play Room Vent Supply21X21 Flay Room Fresh Air Inlet. ^ Supply Diffuser* Vent a x 21 21 X 21^ Boys Play Room Fresh Air Inlet MMMM MM Basemertt Plan No. 2 PLUMBER AND STEAiM FITTER August 1, 1908 Why Science Should Be Observed Prof. J. D. Hoffman Advances Strong Reasons Why Loose Methods Should Be Avoided — Address Delivered at the Niagara Falls Convention of Heating and Ventilating Engineers. The science, if such it may be called,of heating and ventilating engineering,is one that is founded almost completelyupon the laws of thermodynamics. Itis not what one might call an exact sci-ence, but, in its rational design and ap-plication, the engineer may work with areasonable degree of exactness. Most ofthe points of interest in the subject maybe theoretacally developed, yet, as in allbranches of engineering design someparts require theory modified by goodjudgment and the personal equation ofthe designer. In such cases empiricaldata, found by tests upon similar appar-atus, are not onl
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