RHODE ISLAND COAL MEASURES. 161 



The coal from Cranston afforded F. A. Gooch the following analvsis: 1 



Analysis of coal from Cranston, Rhode Island. 



i Per cent. 



Water | o. 24 



Volatile matter I 4.49 



Fixed carbon | 82. 20 



Ash I 13.07 



Total 100. 00 



Sulphur 0.34 



Specific gravity, 2.209 at 150-. 



These troughs appear to be mainly underlain by coal-bearing shales. 

 The Sockanosset mine in Cranston comes in this section. In the valley 

 north of Providence the shales crop out in a cut in the Old Colony 

 Railroad. 



A well sunk in Butler street, corner of Bassett street, in 1895, penetrated 

 the Coal Measures. Samples of the materials brought up from certain 

 depths were furnished the Survey, through Mr. N. H. Darton, by Mr. C. A. 

 Ray, of East Providence, Rhode Island. The following table sets forth the 

 data obtained from this well. 



Record of well sunk in Providence, Rhode Island, in 1895. 



Depth in 

 feet. 



Schist, soft, black, graphitic; with water turning to graphitic mud, somewhat 



too gritty for lubricating purposes 126 



Schist, micaceous, carbonaceous, carrying large cubical iron pyrites 176 



Schist, carbonaceous 309 



Schist, graphitic 341 



Grit, or metamorphic sandstone 352. 5. 



Schist, graphitic, with fragments of vein quartz 419 



Coal, anthracitic; very light, with small cubic fracture and some irregular 



patches of dull black carbon 460 



Coal, cut by veins of quartz, sub fibrous near walls 475 



Coal, with small cubical fracture and more of the dull lusterless carbon, about. 477 



Schist, heavy, black, graphitic, pyritiferous, about 477 



Schist, fine micaceous, pyritiferous in layers 492 



1 Eeport of work done in the Washington laboratory during the fiscal year 1883-84 : Bull. U. S. 

 Geol. Survey No. 9, 1884, p. 18. 

 MON xxxm 11 



