on Atiihracite, Plutnbago, Sfc. 164 



The result of the analysis of this anthracite was 



Carbon 90'1 



Water* 6*6 



Re^siduebyinciO [Alumi'ne .':.*.* .' I'f 



dS'ty whit^cc^ r^ consisting of<^ Oxides of iron | 

 1 -^ I and manganese J 



•^ I^Loss 0*8 



100-0 

 Experiment 2. — The anthracite of Rhode Island, by the ac- 

 tion of the blowpipe, presented a brownish appearance after 

 cooling (owing to manganese). The surface exhibited numerous 

 globules, larger than those of the Lehigh : some of them were 

 transparent, colourless, and very brilliant by reflected hght ; 

 others, and the most abundant, were black and opaque, and 

 were strongly attracted by the magnet ; a few were coloured 

 white and black in spots, the white spots resembling enamel. 

 The surface of the mass presented minute veins similar to those 

 of the Lehigh. 



Some of the black globules were heated for a long time on 

 platina foil, with carbonate of soda ; the mass was yellowish, 

 but became black when immersed in water. By heating and 

 dipping into water several times, the globules whitened : I 

 could not effect their fusion in this way, but with the com- 

 pound flux they readily fused. With this flux the different 

 kinds were tried, and with the same effect. 



The analysis of this anthracite from Rhode Island gave 



Carbon 90-03 



Water 4-90 



Residue by inci-T TSilex 2-14 



. neration, which I ,.^^ • ^- A Oxides of iron! _ _ 

 was of a light | I and manganese J 



brick-red • • • J l.Loss '43 



100-00 

 Another specimen from the same locality, whose colour was 

 a little different, being of a deeper black, and which was not 

 tried with the blowpipe, gave 



Carbon 77-70 



Water 670 



Residue by inci- j ^ Silex 8-50 



neration, co- / 1 5'60 consisting ^ Oxides of iron > ^ 



lour the same f of J and manganese $ 



as the former ) C Alumine a trace 



100-00 

 • It is rather singular that so great a quantity of water as is contained 

 in anthracite should heretofore have escaped notice. It is my intention to 

 examine all the different kinds of coal, to ascertain if this fact be general. 



X 2 Experi- 



