MINEBK00263

• County: San Miguel
• Document: Manager
• Suffix: A

fed *-o at all tisrea'have carefully ~ei~hed. '
' :;ystenstic development is being carried ott Yn the adjoinir$ properties
he company and where ore is being outputted the development is-kept well ahead
xtraction~ thereby leaving large ore reserves on hand at all tines.) i'8iile
in these veins is found to be of better grade is some places than others, sad
amount is assorted for direct shipnent. Tne whole may be said to bo brok-
~;3 transported to mill at mouth of lower tuimel, ~ three
f?ere the ore is duasped ixrto gravity bins and is fed into Lke Grua hers of
l;e pattern, 2 - 9 X l4 and 1 - S z 9. From crushers the ore passes to two sate
:~sn:
:Cornish tolis~ i5 x. 26 and 14 a 36. Tlsence to bins and automatic feeders to
~;ht~5-foot Runtiz~tor. mills. Selom each mill a lour section amaigan~atix~g plate,
eh section abort 56 r. 40 ir_ches. The tails from platen are diatributod to tvren-
-Sour fsve v-..roars. The larger ore values are amalgaom,ted. The concentrates
e o; fair grade and ariount to about one ton to each thirty tans tabled. The
'li }tea a capacity of ?.00 tons every 24 hours, and will averap,e this amount for
gout 25 days 1n each north. 4he gross savii~ by amalgamation sad concentration
as stated at 30 per cert. of values. This la doubtless an over eetfnuate.
The Ware scale in mill is 34.00 ver day for 12 hours for amalE;araatora and
ant~.er-~aien, and $3.50 per flay of 12 hours for r_ll other employees.
Tire ornver used is electric and is generated at Ames, 12 miles distant by
:}:e Tellurldc Power rompaay. The mechanical plant of the Tomboy t%omp~Y Sa a L
atriY.in>; illuctr~tion of the ad~vptability of electric power to mining purposesi
c+rd illuatratea the ease anC efficiency wlth which the total power may be segre°
+;2.ted into siisil units and placed near the points required. The hniab in level
of mine about 3200 feet from mouth of tunnel !m operated by s 100 H.l', orator.
t7isile this 'hoist is eq•~ipped for the use of air, the efficiency of the lattor at

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