June 1, 1834.] THE TECHNOLOGIST: 



521 

 LABORATORY NOTES. 



MUSEUM OF IRISH INDUSTRY, DUBLIN, 



The four following analyses are by "William Plunkett, F.C.S., 

 Assistant Chemist to the Museum. 



Main Seam Coal, 4 feet 6 inches thick, Ballycastle Colliery West ; 

 Antrim Coal Field. 



Absolute Heating Power of the Coal. 

 13-29 lbs. of water at 212 deg. F. converted into steam by 1 lb. of 

 the coal. 



1058-0 lbs. of water at 212 deg. F. converted into steam by 1 cubic 

 foot of the coal. 



Proximate Composition of the Coal. 



Water 7-45 



Volatile combustible matter .... 37'25 



Fixed carbon (coke) . 51-10 



Ash . 4-20 



100-00 

 Amount of sulphur in volatile portion . . 049 



Amount of sulphur in non-volatile portion . 0-22 



Total amount of sulphur in 100 parts . 0'71 



Percentage of nitrogen 095 



Specific gravity of the coal 1-273 



Coal from the Coalbrooke Colliery, Tipperary Coal Field. 



Absolute Heating Power of the Coal. 

 7-29 lbs of water, at 212 deg. F. converted into steam by 1 lb. of the 

 coal. 



763'2 lbs of water at 212 deg. F. converted into steam by 1 cubic foot 

 of the coal. 



Proximate Composition of the Coal. 



Water 6-47 



Volatile combustible matter .... 574 



Fixed carbon (coke) . . . . * . . 74 - 80 

 Ash 12-99 



100-00 

 Amount of sulphur in volatile portion . . 0-27 



Amount of sulphur in non-volatile portion . 2-34 



Total amount of sulphur in 100 parts . 2 - 61 



Percentage of nitrogen 0-07 



Specific gravity of the coal .... 1-686 



Bituminous Coal from Lough Alten (Arigua) District ; Leitrim Coal 

 Field. 



Absolute Heating Power of the Coal. 



12-65 lbs. of water at 212 deg. F. converted into steam by 1 lb. of the 

 coal. 



VOL IV. Y T 



