. Bulletin. 8 I -00<seventh days. Total in j4 imonths. I ,1G0I -013. THE GASES IN COAL. 45 TESTS OF ILLINOIS COALS. An investigation of occluded gases in Illinois coals by Parr andBarker ° gave results that throw additional light on the volume ofgas and the conditions of its emanation. Samples were collected from the working faces. Each sample wasdivided into two parts; one was placed in a jar in air, and the otherwas kept under water in a jar. The samples were allowed to standfor seven months, with the following results: Volumes of methane given off in seven months by Illinois coals. Numbe
. Bulletin. 8 I -00<seventh days. Total in j4 imonths. I ,1G0I -013. THE GASES IN COAL. 45 TESTS OF ILLINOIS COALS. An investigation of occluded gases in Illinois coals by Parr andBarker ° gave results that throw additional light on the volume ofgas and the conditions of its emanation. Samples were collected from the working faces. Each sample wasdivided into two parts; one was placed in a jar in air, and the otherwas kept under water in a jar. The samples were allowed to standfor seven months, with the following results: Volumes of methane given off in seven months by Illinois coals. Number Mine. Relative volume of me-thane to coal (coal=l). of sample. Dry coal. Coal underwater. 1 2 .017 3 OFallon .147 The percentages of methane in the gas given off were as follows:No. 1, wet, 56; No. 2, wet, ; No. 3, dry, ; and No. 3, wet, amounts of carbon dioxide were given off by Nos. 2 and 3, dry. Tests to determine the effect of oxygen absorption were made withsome samples that had been partly air-dried after having been keptbulletin72unit
Size: 893px × 2798px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
