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As Alt'. Rlttenhoufe’s dwellins: at Norriton is 20 
iiiiics N. W. of Philadelphia, our other engage- 
ments did not permit Mr. Lukens, or myfelf, to pay 
much attention to the ncceflary preparations; but 
Tv’e knew that we had entrulfed them to a gentleman 
on the fpot, who had, joined to a complete fkill in 
mechanics, fo extenfive an agronomical and mathe- 
matical knowledge, that the conftrudlion, ule, and 
management of all the necefl'ary apparatus are per- 
fedlly familiar to him. The dull and rainy weather 
prevented our fetting out for his houfe till Thurfday, 
June I ; and we found, on our arrival there, every 
preparation fo forward, that we had little to do but 
to examine and adjulf our refpedtive telefcopes to di- 
flinfl; vihon. Mr. Rittenhoufe had compleated his 
obfervatory, fitted up the different inftruments, and 
made a great number of obfervations, for fixing the 
latitude and longitude of the obfervatory, and afeer- 
taining the going of his time-piece. The laudable 
pains he has taken in thefe material articles will bell 
appear from the work itfelf, which I received from 
him a few days ago, with the following very obliging 
letter ; giving me a liberty which his own accuracy, 
care, and abilities leave me no room to exercife; and 
therefore what follows is entirely as he drew it up, viz. 
“ To the Reverend Dodtor Smith. 
Dear Sir, 
The enclofcd is the befl account I can give of 
“ the contadls, as 1 obferved them, and of what I 
‘‘ faw during the interval between them. I fhould 
“ be glad you would contradt them (and the other 
“ papers) 
