191 

 1885.] J--jx [Ruschcnberger. 



and his final report (8vo, pp. 301, with 2 maps) was presented 

 in 1840. 



Chiefly on the recommendation of the Geological Society of 

 Pennsylvania, which was founded in Philadelphia, April, 1832, 

 and ceased in 1836, the Legislatm-e determined, March 29, 1836, 

 to have made a geological survey of .the State of Pennsylvania. 



The survey was immediately organized. Henry D. Rogers 

 was appointed geologist, James C. Booth and John F. Frazer 

 assistant geologists, and Robert E. Rogers chemist. 



Henry D. Rogers was elected an honorary member of the 

 Boston Society of Natural History, June 1, 1842. He partici- 

 pated in discussions at its meetings every year from 1845 to 

 1858, both inclusive, except the year 1856. All his oral com- 

 munications relate to geological facts or theories. 



In 1844 he delivered a course of lectures on geologj 7 in the 

 Masonic Temple in Boston. 



He became a resident of Boston in 184 6, and was married 

 there in March, 1854, to Miss Eliza S. Lincoln. 



He made six annual reports of the progress of the Geological 

 Survey of Pennsylvania ; the first December 20. 1836, and the 

 last February 1, 1842. The Legislature of 1841-42 failed to 

 make an appropriation for the continuance of the survey, and it 

 was therefore suspended. Professor Rogers was employed from 

 1841 till 1851 by coal companies as an expert. 



Field-work of the survey was resumed in 1851, and continued 

 through 1852, '53 and '54. 



Appropriations made by the Legislature for carrying on the 

 survey were always too narrowly restricted, never liberal. Hence 

 obstacles to the progress of the work intervened and delayed its 

 completion. 



Under an act of March, 1855, it was agreed that the publica- 

 tion of the final report of the survey should be confided to 

 Professor Rogers. He was to own the copyright and receive 

 $16,000, on condition that he delivered to the State, within three 

 years, one thousand copies of it. In order to produce the re- 

 port in an appropriate st} T le for this sum, it was obvious to him 

 that the work must be clone where the skilled labor requisite for 

 it could be obtained at rates below those prevailing at the time 

 in Philadelphia. For the sake of such advantage he transferred 



PROC. AMER. PHILOS. S0C. XXXIII. P. PRINTED NOVEMBER 10, 1885. 



