. Mining and Scientific Press . g price. Ferro-silicon, 50%, is in only moderate demand at around$60 per ton, delivered. MEXICAN oil- INDUSTRY If a balance were to be struck today, and the foreign in-vestment in Mexicos oil closed out, it would be found thatfew companies, if any, have received enough income to re-pay them, savs the latest issue of The Lamp, published bjrthe Standard Oil Co. of New Jersey. They are dependentupon the future for the amortization of their capital ad-vances. Since July 1, when the new taxes went into effect, thesituation as regards the most valuable oil, Southern l
. Mining and Scientific Press . g price. Ferro-silicon, 50%, is in only moderate demand at around$60 per ton, delivered. MEXICAN oil- INDUSTRY If a balance were to be struck today, and the foreign in-vestment in Mexicos oil closed out, it would be found thatfew companies, if any, have received enough income to re-pay them, savs the latest issue of The Lamp, published bjrthe Standard Oil Co. of New Jersey. They are dependentupon the future for the amortization of their capital ad-vances. Since July 1, when the new taxes went into effect, thesituation as regards the most valuable oil, Southern lightcrude, has-been as follows: value ol ? barrel of tins oil In the United Btatet 11.: ;.,, ii large, company fr tour tnonthi InLQ21, excluding depreciation and depletion, per barre) IV i .,r transportation to ( ita In lha United - Hay .l and June 7 0 •! - .1 H The margin remaining, out of which the producer mustrecover cost of wells, leases, pipe-lines, terminals, etc., is15 cents. Aug 192] MINING AND SCIENTIFIC PRCSS. ^.PROGRESS INFORMATION FlKMSUED BY MANlFAC Tl KKRS iiiiiiiiinilill Illlllll I Ililllliiiiilniliiiilllllliilll II iiiiiiiiiiiiiiiiiillllllilllllllil iiiiiiiiilllllllliiiii i i hum i iniiimi iiiiiiiiiiiiiiiiiiinilll iilllllllllllllllllll Ill KFKHIKM MINK VENTTLIiATION Mining engineers agree that the efficient ventilation ofnines consist in the supplying of such volumes of circulatingair at all working places as will enable the miners to workin comfort at maximum physical capacity with unimpairedhealth. Dan Harrington, mining engineer of the Bureauof Mines, in Technical Paper No. 251, says: As regards thecost in dollars and cents, adequate and controlled ventilationwould be justified by decrease of time lost by undergroundworkers, by saving in compressed air used for blowers, andby better control of mine-fires. • • * With moving air-currents at working faces, workers may save as much as50 to 70 7r of the time which is now lost in seeking relieffrom hot.
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