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Reports of the Inspectors of Mines of the anthracite coal regions of ...

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182 ANNUAL REPORT OF TEE<br />

Closed or open periphery<br />

DrMg <strong>of</strong> mines m inches<br />

<strong>of</strong> water-gauge<br />

Amt. <strong>of</strong> air discharged<br />

per min. in cubic feet,<br />

Isauiber <strong>of</strong> fan revolutions<br />

per minute<br />

Number <strong>of</strong><br />

openings ..<br />

Fan side openings,<br />

diameter <strong>of</strong><br />

fan side<br />

Fan diameter in feet<br />

f^ S - r,<br />

« W O S<br />

< Ph<br />

Differs in feet<br />

S ^ ^<br />

W ^^ M<br />

^ 5 ^<br />

o 3 H<br />

1(5<br />

-' a r^<br />

o > 2<br />

P^<br />

c«<br />

"L'OOCCOOCCCCO O OS^<br />

(M5"i(Mcqr-i!Mc-icqcqcq(Mc-.>-!- ® -P C<br />

d<br />

c s a<br />

CI T-i Tti c-._, t- 5 ® o -S s i:<br />

oddc.Sa-^'Sc;.<br />

O tC^<br />

O©<br />

CC CO<br />

iS'uuiljer <strong>of</strong> fan >-l C-1 M -* IC C2 —I 1^ X C-. © C-l CO -S- 1-1 O

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