CRANE. | Economy of Mining Operations. 347 
CORNISH PUMP WORK. | 
Only the cost of the pumping operations is considered here, 
which can be shown to the best advantage by means of data 
obtained from the mines and pumping stations. 
[ No. 1.] Lift, 100 feet; two nine-inch pumps. 
Labor (two men, night and day shifts), per week....... $28 00 
COSTHOTEW ALOT MER rire eer rents eee Recee Sek ew ce oieie odauslsl one dusts Rs 7 00 
Coste tel oiiGrmeeae ne rate ee aan oy aetonetern Siar we anal qe aia « dl BD 
CoOscror#lub rican tye er eee ae ee Gee wees wie tie Wibre 3 50 
(CHOSE HE TUK a Ge icles GR ak eels 65 00 
Costroisincid ental ssa ee ey eee Snes hk eo) ee 10 00 
MO Cale eae yt ete ae a eR EL ATS UPI Gear A $114 00 
The cost per day would, then, be $16.28. The discharge was 
18.2 gallons per stroke, 8 strokes per minute. Two pumps 
will, then, give 211.2 gallons per minute. When necessary, 
the number of strokes may be doubled; 422.4 gallons per 
minute would then be discharged. At 211.2 gallons per 
minute, the discharge per day (twenty-four hours) would be 
304,128 gallons, which, at acost of $16.28, would give .0053 
of one cent per gallon. 
[ No. 2.] Lift, 110 feet; nine-inch pump. 
Mabors(twoumen)) per weekwne. ss). saescosts cess cele $26 00 
CoalateS2s2o peritomncmssceyse sg eee pak wekerssscee bb ia ahs 30 00 
EMD VICATIUSRe ey Vasari wclrai etter rete siok iano sirimncee b cnte ee ba’ 1 00 
IL GEREN GVET ISIS 5 ae es CE Bo TG Sa oa TS ea 3 00 
Witte rprOreoOllencemeny mriminntiey cst sila eat ic: laa genes 40 
TNOTERW LA Bb MeN Si NG BS 4 atl ah a 2 an i re $60 40 
The cost per day would, then, be $8.63. The discharge 
was 152,284 gallons per day (twelve hours), which, with $8.63 
cost, would give .0056 of one cent per gallon. 
[ No. 3.] Lift, 50 feet; eight-inch pump. 
MAO MAD CORPCIAGAViar na ceicy ae ee inka eae checae eo os $1 75 
COPE cts cyclic ea ats ica a Caco ee CL 60 
Oiler eee eon er reaes treat ra ery tates er crete cece ate asl ie and Ble 12 
Weatherwise ah rice michel a ue Santas cree ctaerate ie 20 
ANGLE es 6 odo oicberok Gk Dalai ERO OIE ERR ESD IDEs De eR $2 67 
The cost per day, $2.67, equals 26.7 cents per hour ( ten-hour 
day). The pump lifts 50,112 gallons per day, thus making 
the cost per gallon .0053 of one cent. 
[No. 4.} Lift, 90 feet; nine-inch pump. 
Labor, two men at $1 and $1.25 per day................ $2 25 
CoalateneemerstOman eee en ls ees cic 5.4 conaeac conse ances 2 00 
Tepe RON geet eanarae diate h ai. i Taso nae ae a Males 12 
TU PFEHH aVENGST Sie, Seay oa tea Se crieey Are Bee ee EP OS NEE Pe 20 
EO Caer ie ese er rho Maleltalaveilen'as aitawsbarolaterstemeiaises $4 57 
23—Vili 
