Eon TEN AT S. XXXI 
No 
XXV. An Enquiry into the Caufe of the Increafe of Bilious and 
Intermitting Fevers in Pennfyluania, with Hints for prevent- 
ing them. By Benjamin Rufh, M. D. Profeffor of Chemifiry 
in the Univerfity of Pennfylvania, 
XXVI. An Account of the late Dr. Hugh Martin’s Cancer Pow- 
der, with brief Obfervations on Cancers. By Benjamin Ruth, 
M.D. &e. Ge. 
XXVII. Mayeri Obfervationes Aftronomica, 
XXVUI. Obfervations on the Caufe and Cure of the Tetanus, by 
Benjamin Ruth, M. D. &c. Ge. 
XXIX. Letter concerning Chimneys, addref[ed to His Excellency 
Benjamin Franklin, E/y. -L. L. D. Prefident of the State of 
Pennfylvania, and of the American Philofophical Society, Gc. 
by Dr. Rufton, 
XXX. Obfervations on the annual Paffage of Herrings, by Mr. 
John Gilpin, 
XXXI. Obfervations on a Solar and Lunar Eclipfe, communicat- 
ed to the Society by M. M. de Grauchain, Major-General of 
the French Squadron, ‘ 
XXXII. 4n Account of the Tranfit of Venus over the Sun, June 
1769, as obferved at Newbury, in Maffachufetts ; by the 
Rev. Samuel Williams, 4. JZ. 
XXXIM. An eafy and accurate Method of finding a true Meri- 
dian Line, and thence the Variation of the Compafs. By Ro- 
bert Patterfon,, 
XXXIV. Afronomical Obfervations, communicated by Mr. Rit- 
tenhoufe, 
XXXV. A Letter from Mr. Otto to Dr, Franklin, with a Me- 
moir on the Difcovery of America, 
XXXVI. The antifeptic Virtues of Vegetable Acid and Marine 
Salt combined, in various Diforders accompanied with.Putri- 
dity ; communicated in a Letter to John-Morgan, J. D. 
F. R.. S:- 
Page. 
206 
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