Miners' Circular, Utgaver 30-42

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Bureau of Mines, 1928

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Collar and props supporting roof at slip or crack in roof 19
19
Crossbars supported by short pumb posts recessed into coal 20
20
Forepoling under loose roof 21
21
Timbering cavity in roof of entry where coal is firm and strong 22
22
Timber broken in attempt to hold roof material sprung before timber was placed 23
23
Props set on floor without recess 24
24
Four rows of props staggered in room 25
25
Five rows of props in room 26
26
Four rows of props in room
27
Three rows of props in room
28
Crossbars supported by props set in recess in coal rib
28
Crossbars supported by props set in recess in coal rib
29
Crossbars supported by props in room
30
Draw slate unsupported may fall as indicated
31
Timbering along line of pillar extraction
32
Purpose of this publication 1
1
Detection of methane 18
18
General requirements of breathing apparatus
43
Detection of carbon monoxide
47
Detection of mine gases by analysis
64
ILLUSTRATIONS
Simplified section of Burrell methane indicator 37
37
Diagramma sketch of Martienssen methane detector 43
43
Other unbreathable gases in Gasmask investigations of
83
Introduction 1
1
Figure
5
Information to be collected at time of sampling 25
25
Types and limitations of gas apparatus used by the Bureau of Mines
31
Description of portable Orsat 36
36
Preparation of solutions 42
42
Procedure for withdrawing gas from pipettes 50
50
Connecting sample container to apparatus 56
56
cedure 66
66
Summarized procedure for analyzing various types of mine atmospheres 76
76
Care and storage of apparatus 85
85
Systematic inspection 87
87
Introduction 1
1
Figure
5
Method for filling vacuum containers through extension tubes leading
22
Information to be collected at time of sampling 25
25
Details of portable Orsat apparatus for mine gases 31
31
13 14
4
Miners at work wearing earlytype selfrescue respirators
12
Adjusting headbands to fit
13
Details of permissible carbon monoxide type D selfrescue respirator
14
Miner wearing type N gas mask and testing with flame safety lamp for methane gas and oxygen deficiency
20
Details of canister of type N gas mask
22
Gibbs oxygen breathing apparatus
32
Paul oxygen breathing apparatus
33
McCaa oxygen breathing apparatus
34
FleussDavis oxygen breathing apparatus
35
Assembled view of U C C methane detector 47
47
Draeger 1924 oxygen breathing apparatus
10
McCaa halfhour oxygen breathing apparatus
11
First position pronepressure method of artificial respiration
12
Second position exhalation pronepressure method of artificial respiration
13
Third position inhalation pronepressure method of artificial
14
20
20
22
21
40
32
48
48
Iodine pentoxide carbon monoxide indicator showing extra tubes
16
Sectional view of iodine pentoxide carbon monoxide detector 53
53
respiration
70
Testing a type N gas mask for tightness
7
First position inhalation Sylvester method of artificial respiration
15
Pyrotannic acid apparatus for sampling and determining carbon
19
Mine rescue problem in mine 9
9
Details of a Bureau of Mines safety car 14
14
Second position exhalation Sylvester method of artificial respiration
16
Using an oxygen inhaler in conjunction with artificial respiration
17
Typical mine rescue truck 18
24
Interior view of mine rescue truck without equipment in place 18
34
Stateowned mine rescue station La Salle Ill 36
36
48
48
49
49
50
50
Map of West Virginia showing situation of mine rescue stations and mine rescue districts 52
52
Introduction
1
Lifesustaining capacity of barricaded chambers
9
Sesser No 1 mine
28
Curves for calculating per cent of carbon monoxide from per cent
64

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Side 49 - The use of this mailing label to do so will be official business, and no postage stamps will be required UNITED STATES PENALTY FOR PRIVATE USE TO AVOID DEPARTMENT OF THE INTERIOR PAYMENT OF- POSTAGE, $300 BUREAU OF MINES OFFICIAL.
Side 41 - With arms held straight, swing forward slowly, so that the weight of your body is gradually brought to bear upon the patient. The shoulder should be directly over the heel of the hand at the end of the forward swing. Do not bend your elbows. This operation should take about two seconds.
Side 10 - ... may step into the street a sufficient distance to obtain a clear view, but not more than three paces; after the children have crossed, he returns to his station on the curb. Where the street is wide or the traffic heavy, there should be two patrol boys at the crossing. One operates as described in the preceding paragraph, on the side from which the children are coming. The other operates similarly on the opposite curb, giving attention to possible traffic approaching on that side and assisting...
Side 40 - Place the palms of the hands on the small of the back with fingers resting on the ribs, the little finger just touching the lowest rib, with the thumb and fingers in a natural position, and the tips of the fingers just out of sight.
Side 10 - Same as previous item with more possibility of collapse and syncope, increased respiration and pulse. 50-60 Syncope, increased respiration and pulse; coma with intermittent convulsions; Cheyne-Stokes
Side 36 - The closing valve of the highpressure gas container shall be provided with a device to prevent the wearer of the apparatus from screwing the stem entirely out of the valve. The closing valve shall also be provided with a device to enable the wearer to lock the valve stem open when the valve has been opened to the desired point. The valve-closing device shall be operable by hand without use of wrenches or external levers.
Side 9 - The function of the school safety patrol is to instruct, direct and control the members of the student body in crossing the streets at or near schools. Patrols should not be charged with the responsibility of directing vehicular traffic, nor be allowed to do so, other than signaling to a motorist who approaches the crossing after the student pedestrians have left the curb. • "Note: Patrols need not and should not, therefore, be recognized by city ordinance. They must not be termed 'police
Side 27 - Said commission shall, within ten days after their appointment, meet and organize by electing one of their number chairman and another secretary of said commission, who shall hold their respective offices for a period of one year from the date of their election and until their successors are elected and qualified. Members of the said commission...
Side 5 - One-half of 1 per cent of carbon dioxide in normal air causes a slight and unnoticeable increase in the ventilation of the lungs; that is, a man exposed to one-half of 1 per cent of carbon dioxide will breathe a little deeper and a little faster than when in pure air. If there is 2 per cent of carbon dioxide in the air, the lung ventilation will be increased about 50 per cent; if there is 3 per cent, the lung ventilation will be increased about 100 per cent; 5 per cent causes about 300 per cent increase...

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