e now SS) making a total number of skilled and unskilled men necessary to celerity and _ safety, } Hi 5 —ael in the railroad shops of 204.194. The next largest to say nothing of economy. Over ee a a = my ia 25,000 miles of American railroad SCaG;' OS Ma | “4 Sx are now worked by the block BAS) a… … side tracks and crossovers, so far as they foul the ADMISSION VALVE main track) are clear—not occupied by wheels at any The upper disk is a red home signal; the lower is a G’stant signal, green, Both indicate that their respective sections are ov ‘upied, point—the circuit of the battery is through…
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