206 [Oct. 5, 
DuBois. ] 
the Central High School of Philadelphia. Nor was he wholly content 
with his sphere as a teacher. His studies had reacht out across and be- 
yond the confines of his specialty into the neighboring territories of min- 
eralogy and geology. 
Concerning this field of ouv subject’s labors, no one is so well qualified 
to speak as Prof. J. P. Lesley ; and I am indebted to him for the follow- 
ing paragraphs regarding the geological surveys of Pennsylvania and 
Delaware. He says: ‘‘Prof. Booth and John Frazer, then a young man, 
were appointed by Prof. Rogers, in the spring of 1836, his two assistants 
in prosecuting the work of the First Geological Survey of Pennsylvania. 
From Spring to Fall they traveled along the Susquehanna and Juniata 
valleys, blocking out the order of the great formations. Prof. Booth was 
sent by Prof. Rogers up the Potomac to make a section which could be 
compared with the Juniata section ; and when the three met at Hunting- 
don, he announced, to the astonishment of Mr. Rogers, that the moun- 
tains which fill the middle belt of Pennsylvania were made by two sepa- 
rate formations, now known as No. IV and No. X. Mr. Rogers was un- 
willing to accept this conclusion, and instructed Mr. Frazer to go to the 
Huntingdon-Bedford line and make a cross section from the Broad Top 
coal down to the limestone of Morrison’s Cove. At the end of the week 
the three met again in Huntingdon, and Mr. Frazer confirmed the state- 
ment of Prof. Booth. Mr. Rogers was still dissatisfied, and then went 
himself to repeat the section made by Mr. Frazer, finding it correct, and 
then accepting Prof. Booth’s Potomac section. Thus the grand column 
of our paleozoic formations was establisht, and the credit of it is due to 
Prof. Booth.” 
Prof. Lesley adds that : ‘‘ Both Prof. Rogers’ assistants resigned at the 
end of the year; and Mr. Booth was then appointed, immediately, or not 
long thereafter, State Geologist of Delaware. His work in Delaware was 
publisht in his Report, an octavo volume, now so rare that it is impossi- 
ple to obtain a copy. My belief is that Prof. Booth abandoned field work 
very early in his career, and devoted himself to his chemical laboratory. 
At all events, he is known in science altogether as an accomplisht chem- 
ist, with a great reputation for diligence and accuracy, especially in the 
field of mineral analysis.” To Prof. Lesley’s statement I may add that 
the Geological Survey of the State of Delaware was in Mr. Booth’s charge 
during 1837-8 ; the reports were publisht as the Annual Reports of the 
Delaware Geological Survey (Dover, 1839), and after that he issued the 
“«‘ Memoir of the Geological Survey of the State of Delaware with Applica- 
tion to Agriculture’ (Dover, 1841). 
Mr. Joseph E. Hover, an old friend and co worker with Prof. Booth, 
thus writes of another venture : 
“Tn the year 1845, Prof. Bouth visited Mine la Mott, a mining locality 
in the State of Missouri, and began the mining of cobalt, which, I think, 
had but recently been discovered there. After a time he had mined.a 
large amount of cobalt, which he forwarded to England. But this enter- 
