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the question ; for so long as the laws which govern the universe are in force, that which was established at one period of' time will still remain a fact in all suceeedin~ ages, and no amount of controversy, or opinions of any set of men, advanced as a species of spe. eial advocacy, have the ~ower of setting it aside. The tr~Le ex/)e~se of an engine is the oriTb~a~ ];r~'ce, added to iZs ar~lcrl cost jb~" ~ab~lainctnce, c~pitagized s~F'at 21) ycag's' 7)urckase. The direct supplydoi:10.1016/s0016-0032(71)90367-x fatcat:ary2wyissfawbawpz4yj243ghq