h 



ASTRONOMICAL PAPERS. 



^3 



thefe material articles, will befl appear from the work it- 

 felf, which he hath committed into my hands, with the fol- 

 lowing modeft introdudion; giving me a liberty, which his 

 own accuracy, care and abilities, leave no room to exercife. 



DEAR SIR, 



HE 



Norriton, ]n\j iStli, 1769. 



^ 



lofed is the bejl account I can give of 

 .CTS, as I ohj'erved them; and of ivhi 



If 



fj. 



*' into a /mailer compafs^ as I would have done myfdfy if 

 *' / had known hoiv. / beg you would 7iot copy any thing 

 " merely becauje I have written it^ but leave out what 



kjuperjl\ 



I aniy 

 With great ejleem and affeSlion^ 



F 



Yoursy &c. 



BAVw rittenhouse:' 



To Revd. Dr. Smith. 



Mr. Rittenhoufe's Ohfervations at Norriton, before and 

 after the Tranfit of Venus, June 3d, 1769; for fixing 

 the Latitude and Longitude of his obfervatory^ and the 

 going of his clocks &c. 



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ARLY in November-, 1768, I began to ere£t an 

 Obfervatory^ agreeable to the refolutions of the 

 American Philojophical Society; but, through various 

 difappointments from \torkmen and weather, could not 

 complete it, till the middle of Aprils 1769. .1 had for 

 fome time expeded the ufe of an Equal Altitude inftru- 

 ment from Philadelphia] but finding I could not depend 

 on having it, 1 fell to work, and made one of as * fimple a 



" conftrucSion 



* It li difrH'cd above. No. 4. <f the Jjrparaiui. 



