264 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
rail. An acetylene lamp lowered into it was immediately extinguished at a cer¬ 
tain sharply defined line. The temperature at this place was +11.5° C. ( + 53° F.). 
A sample of the gas contained in the winze was collected by the same method as 
before, and as analyzed by Mr. Hawley contained the following proportions: 
Analysis of gas from Conundrum mine, March 21, 190l/.. 
Carbon dioxide. 8. 3 
Oxygen. 10. 2 
Nitrogen (by difference). 81. 5 
100 . 0 
A short distance north of the winze the air in the drift was examined and 
found to contain 0.11 per cent carbon dioxide. Near this point a crosscut several 
hundred feet long extends in a northeast direction into the Moon-Anchor ground. 
This crosscut was found to be full of gas, and could be traversed only to a point 
150 feet northeast of the junction. Here the temperature was +15° C. ( + 59° F.), 
or 6° warmer than at the winze, which was only 200 feet distant. The air at this 
place contained 1.3 per cent dioxide. The acetylene lamps barely burned, and the 
atmosphere was exceedingly oppressive and distressing. 
The conditions described continued during the remainder of the year 1904. 
In addition to the natural circulation indicated above, a steam pipe was carried 
down into the workings, and some benefit is said to have been derived from forc¬ 
ing steam into the drift. During the last days of December a man was suffocated 
on level 6 while attempting to enter this bottom level alone during a time of low 
barometer. His body was recovered in twenty minutes, but it was found impos¬ 
sible to resuscitate him even b} r the immediate use of oxygen. 
Since March, 1904, Mr. B. F. Tipton, superintendent of the Conundrum mine, 
has kept a complete record of barometer readings in order to ascertain the con¬ 
nection between the influx of gas and the atmospheric pressure. This important 
record follows, copied in full. It is to be hoped that at other mines where gas is 
known to exist a barometer will always be kept and records preserved. 
Record of barometric stand and gas conditions in the Conundrum mine, Cripple Creelc, on 600-foot level. 
April 21 
April 22 
April 23 
April 24 
April 25 
April 26 
April 27 
April 28 
April 29 
April 30 
May 1.. 
May 2.. 
May 3.. 
May 4.. 
Date. 
Barome¬ 
ter at 
portal 
of adit. 
1904. 
Air conditions in mine. 
Weather conditions. 
20.3 
20. 4 
20.4 
Very bad; candles will not burn.. 
Good. 
Gas rising; candles will just burn 
20.6 
20.7 
20.5 
20.5 
20.3 
First-class. 
Good. 
A little gas, but lights will burn... 
No gas on levels; winzes are full... 
Gas very bad; lights will not bum 
20.3 
20.7 
20.4 
20.2 
20.3 
20.3 
Gas 2 feet in bottom of levels; lights burn well in 
back of levels. 
First-class. 
Gas rising, but candles will burn. 
Candles will not burn. 
Good. 
_do. 
Sunny; cloudy and snow. 
Sunny. 
Sunny; high southwest 
wind. 
Snow; high wind. 
Sunny; no wind. 
Sunny. 
Do. 
Sunny and high southwest 
wind. 
Cloudy; north wind. 
Snow. 
Cloudy. 
Snow. 
Sunny. 
Do. 
