Accidents in the comstock mines and thei
โ
John A. Church
๐
Article
๐
1879
๐
Elsevier Science
๐
English
โ 794 KB
67 8. Miscellaneous. The distribution among these groups in .m 1877 1878 1879 6 mos. 4 mos. winding. each )'car is shown in the ibllowing summary : (1.) Casualties due to fidls of rock, ice, timber, etc. Number of (x'x~'urrences, Casualties, thtal, Casualties, not fatal, Proportion thtal, 36 per cen