Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 18
owing is a rule that is simple enough, but which gives results that may be inerror by fifteen per cent, or thereabouts. When such an error is permissible, this rulemay be used; but when further refinement is necessary, one of those given below shouldbe substituted for it. The shaded part in Fig. 1… … Fig. 1.— Illustrating Rule I. calculations based on more exact methods, that the two small segments, taken together,are about equal to half the triangle. Therefore we have the following: Rule I. Multiply the base of the segment by half the altitude, and to the productadd half of itself. (Error may…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-621-393.webp)
