106 Mr. Lar drier Vanuxem on [Feb. 



observed in the ordinary combustion of this coal, and presented 

 veins or layers of the matter of the white globules ; showing 

 that the impurities of the coal were not regularly intermixed with 

 its carbon, or, upon the supposition of its being fused carbon, 

 that its production was extremely irregular. 



With the flux before mentioned, the different kinds of globules 

 were melted without difficulty. By heating a centigramme and 

 a half of the globules in powder for a long time with caustic 

 potash, about three-fourths of a centigramme of silex was 

 obtained. It manifested itself by its gelatinous appearance 

 before the water was driven off. 



The result of the analysis of this anthracite was. 



Carbon 90-1 



Water* 6*6 



Residue by incineration,"! Q « ... p 

 of a dirty white colour, j^'^ consistmg of 



100-0 



Exper. 2. — ^The anthracite of Rhode Island, by the action of 

 the blowpipe, presented a brownish appearance after cooling 

 (owing to manganese). The surface exhibited numerous glo- 

 bules, larger than those of the Lehigh ; some of them were 

 transparent, colourless, and very brilliant by reflected light ; 

 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 resembhng 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 dip- 

 ping into water several times, the globules whitened ; I could 

 not effect their fusion in this way, but with the compound 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, 



* 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. 



