Chicago : Engineering and Contracting Pub. Co. · leaf 645
00 VALUES OF -e IN MINUTES AND SECONDS MHN. AVG. MAX.- • BRICK YARD 188 224 345J- R. R.BORROW PIT 62 259» eoo ROCK OUT8 19 410 1309 CRUSHED STONE 103 414 e29 « EARTH AND G.DRIFT 246 4 56 103 - IRON ORE 745 24l28 61118 SAND AND G. PITS 247 3358 7224 … GO Fig. 1.—Diagram for Use With Cost Curves. (Value of 27d .shown Kraphlcally.J Fig. 2.—Diagram for Use With Cost Curves. 1 Value of e shown Kraphicnlly.) suits of the observation of nearly 50 differ -. Hi hovels al woi 1 in vai ion kind I earthand rock. Tlx- unit costs of working by hand will…
Buildings
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