The Menominee Iron Range : its cities, their industries and resources, being a sketch of the discovery and development of the great iron ore beds of the North, situated within portions of the States of Michigan and Wisconsin south of Lake Superior : submitted as a hand-book for the information of those seeking a profitable field for labor and investment . present generalmanager, this was accomplished. Limited space precludes all possibility of detail. Aninteresting paper descriptive of the work and written by Mr. Kelly was read before ameeting of the Institute of Mining Engineers at Cleveland
The Menominee Iron Range : its cities, their industries and resources, being a sketch of the discovery and development of the great iron ore beds of the North, situated within portions of the States of Michigan and Wisconsin south of Lake Superior : submitted as a hand-book for the information of those seeking a profitable field for labor and investment . present generalmanager, this was accomplished. Limited space precludes all possibility of detail. Aninteresting paper descriptive of the work and written by Mr. Kelly was read before ameeting of the Institute of Mining Engineers at Cleveland last June. Water was struck20 feet down, which a 200 gallon pump failed to lower. A No. 10, 400 gallon Knowlespump was substituted. A Caisson or drop shaft was constructed, 4 feet larger in everyway at bottom than top, to aid its settling, and was divided into three compartments towithin twelve feet of the bottom. After sinking 15 feet the pumps were started; beforesinking below water level additional power was found to be necessary. Two boilers of 135 joint horse power andpumps were placedpump. At a depth ofwere hoisting 1,500times an additionalrails had to be placedit in place. On onewere drowned under,tion notwithstanding,tion reads like an en-The difficulties whichsealing up of the droping, bolting and ce-crete were howeverThirty-four feet was. Rock Drilling, Twelfth Level,Hamilton Mine. two No. 10 Cameronunder the Knowles48 ft. the three pumpsgallons a minute. Atweight of 30 tons ofon the caisson to keepoccasion the pumpsbut continued the mo-The work of construe -gineering romance,beset the blasting, theshaft and the timber-menting it with con-finally through a living quicksand, and after 129 days of exciting and original work, the ordinary sinking wascontinued in the regular way. The conditions are so variable in different mines, that diverse methods have to beadopted in the endeavour to obtain the greatest output at the least possible cost, havingdue regard
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectironmin, bookyear1891
