. The American encyclopædia of commerce, manufactures, commercial law, and finance. IT States on Independence Day, tlio imports fromChina for the year 1878 ammmiing to •?1 ; public nuisance has been of late prohibited— ineffectually to this day — by the legislatureof New York and other Slates. Imp. fluty^ per hox of 40 packs, not over 80 in each pack,SI per box ; and lo tbo same proportion for grealvr or lessDumbera. Fire-Damp. In most coal-mines the coal itselfis subject to chemical changes which cause it togive forth large quantities ofcarburetted hydrogen pas,known to the min
. The American encyclopædia of commerce, manufactures, commercial law, and finance. IT States on Independence Day, tlio imports fromChina for the year 1878 ammmiing to •?1 ; public nuisance has been of late prohibited— ineffectually to this day — by the legislatureof New York and other Slates. Imp. fluty^ per hox of 40 packs, not over 80 in each pack,SI per box ; and lo tbo same proportion for grealvr or lessDumbera. Fire-Damp. In most coal-mines the coal itselfis subject to chemical changes which cause it togive forth large quantities ofcarburetted hydrogen pas,known to the miners as ).Sometimes, when a hole forblasting is bored, a jet ofthis terrible pas will innncdi-alely stream forth from are many cavities inthe coal quite full of gas;and when one of these islaid open by the nnners pick,the gas rushes out with acurrent called a Uoirer, con-tinuing in action for evenmonths together. pent-up reservoirs of such gas,Pit free after an unknownperiod of accumulation, arethe most dangerous sourcesof explosion. If small coalis set
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherbostonesteslauriat
