The Michigan Engineer: Containing the Proceedings of the Michigan Engineering Society for 1902 (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from The Michigan Engineer: Containing the Proceedings of the Michigan Engineering Society for 1902

From the crushing tables we learn that the average crush ing rate per hour for all the stone crushed was cubic yards. We will call it 6 yds., and 60 yds. A day's crushing, thus making the cost per yard for interest and depreciation of machinery 4 cts.

Again referring to table for July and August, we have, as labor cost including fuel, oil, and repairs, 25 cts. Per yard.

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