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Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 257
to the 25© LOCOMOTIVE ENGINEERING middle of the space between it and line 2. Again, line2 stands for the remaining half of the second spaceand the first half of the third, and so on. This is animportant matter, and should be thoroughly under-stood, because if the spaces are all made of equalwidth,… … ss 87 7fefi Figure 117 If the spaces are all made equal, the measurementswill require to be taken in the middle of them, anderrors are liable to occur, whereas, if spaced as beforedescribed, the measurements can be made on theordinates, which is much more convenient and willinsure correct results.…Locomotives
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