THE TECHNOLOGIST. 



[June 1, 1864. 



522 LABORATORY NOTES. 



1082-37 lbs. of water at 212 deg. F. converted into steam by 1 cubic 

 foot of the coal. 



Proximate Composition of the Coal. 



Water 172 



Volatile combustible matter .... 19-05 



Fixed carbon (coke) 71-60 



Ash 7-63 



100-00 



Amount of sulphur in volatile portion . . 1-156 

 Amount of sulphur in non-volatile portion . 0717 



1-873 



Percentage of nitrogen 0-341 



Specific gravity of the coal .... 1*369 



Coal from the third seam from Gubbarudda Colliery, Valley of 

 Arigua ; Connaught Coal Field. 



Absolute Heating Power of the Coal. 



14-29 lbs. of water at 212 deg. F. converted into steam by 1 lb. of 

 the coal. 



11930 lbs. of water at 212 deg.F. converted into steam by 1 cubic 

 foot of the coal. 



Proximate Composition of the Coal. 



Water 



Volatile combustible matter 



Fixed carbon (coke) 



Ash 



Amount of sulphur in volatile portion 

 Amount of sulphur in non-volatile portion 



Total amount of sulphur in 100 parts 



Percentage of nitrogen «... 



Specific gravity of the coal 



1-12 



1655 



74-46 



7-52 



99- 



034 



0-64 



0-76 



1-336 



Coke manufactcred from the Unwashed Culm of the 

 Seltaxnaskeagh Colliery, Connaught Coal Fields. — By Sydney 

 R. Poxtifex, Student in the Laboratory. 



Absolute Heating Power of the Coke. 



6-51 lbs. of water at 212 deg. F. converted into steam by 1 lb. of the 

 coke. 



769-35 lbs. of water at 212 deg. F. converted into steam by 1 cubic 

 foot of the coke. 



