64: Scientific Intelligence. 



necticut to Vermont, and has found that the hydro-mica and chlo 

 ritic hydro-mica slates associated with the limonite beds of Berk- 

 shire are of the same formation with the liydro-raica, chloritic, and 

 micaceous slates of Graylock and the Taconic rancje ; and witli 

 the hydro-mica slates of the ridge lying northeast of Rutland in 

 Vermont, and of others west and north of Rutland ; and with the 

 staurolitic schists of the limonite region of Salisbury, Connecticut. 

 Since the limestones associated with the slates of West Rutland 

 abound in distinct Lower Silurian fossils, referred to the Chazy 

 by Billings,* part of the Green Mountain slates and schists are 

 unquestionably Lower Silurian. What is the age of the rest is 

 not yet positively known. 



Mr. Carll's report contains the results of his observations in the 

 oil district of Venango County — giving in detail the geological 

 '■ ■ •' ■• of the oil, and its distribution also 



nd topographical distributi 

 1 depth. 



in deptl 



Mr. Lesley's notes on the comparative geology of the adjoining 

 parts of the States of Ohio, New York and Pennsylvania, are of 

 great interest. The equivalency and tlistribution of the forma- 

 tions are discussed, and the age of the oil-bearing beds, and some 

 new views and facts are brought out. Mr. Lesley states that the 

 Catskill sandstone does not thin out westward in New York, as 

 heretofore described, but that it continues into Ohio, and that it 

 includes the " Rock-City" conglomerate of Chatauqua Co., N. Y. ; 

 also, that the conglomerate under the Coal measures, to which 

 the Rock-City conglomerate has been referred, " seems nowhere 

 to reach the New York State line, even in outlying patches.'' 



The Chemical Report of Mr. M'Creath contains descriptions 

 and proximate analyses of bituminous coals of many localities, 

 and analyses of various iron ores, limestones and fire clays. It 

 states that the average amount of water in the bituminous coals 

 analyzed is only 1-03 per cent; the average of ash about 5-38 per 

 cent'; of phosphorus, -014 percent; of volatile combustible mat- 

 ter from bituminous coals of Clearfield Co., 23-64 per cent, of 

 Centre Co., 23-81, of Jefferson Co., 32-60, of Armstrong Co., 

 34'99 per cent ; of fixed carbon in coals of Clearfield and Centre 

 Cos., 08-97; of sulphur in 34 coals from Clearfield Co., 1-36 per 



4. The Vertebrata of the Cretaceous FormatioRS of the Westj 

 by E. D. Cope. 304 pp. 4to, with 57 plates. Report of the U. S. 

 Geological Survey of the Territories by F. V. Hatdejj^, U- ^-^ 

 Geologist in charge, and under the authority of the Department ''t 

 the Interior. Vol. IL Washington, 1875. — Professor Cope's Ke- 

 poi-t is another of the great works on science due to reseanlies 



