( xliv ) 



N". _ _ Page. 



LXX. Account of Chiyftallized Bafaltes found in Pennfylvanla — By 



Thomas P. Smith, 445 



LXX I. Obprvations for determining the Latitude and Longitude of the 

 Toivn of Natchez — By Andrew Ellicott, Efq. Commifftoner on the part 

 of the United States., for running the line of Demarhation betiveen them 

 and the Spanifl} Territory. Communicated to the Society by R. Patter- 

 fon, 447 



LXXIl. An Anfwer to Dr. Jofeph Prieftley's Confiderations on the Doc- 

 trine of Phlogiflon, and the Decompofition of Water ; founded upon de- 

 vionflrative Experiments . By James Woodlioufe, M. D. Profeflbr of 

 Chemillry in the Univerfity of Pennfylvania, &c. 452 



LXXIII. Philological View of fame very Ancient Hoards in feverat Lan- 

 guages. By the Rev. Nicholas ColUn, D. D. Reilorof the Swedifli 

 Cliurches in Pennfylvania, 476 



LXXIV. Memoir on the Extraneous FqJJilt, denominated Mammotli 

 Bones : principally dfigned to fl:ie'w, that they are the remains of more 

 than one fpecics of non-defcripi Animal. By George Turner, Member 

 of the A. P. S. Honorary and Correfponding Member of the Batli 

 and Weft of England Society, &c. 510 



LXXV. Defcription of a Speedy Elevator. By the Inventor, Nicholas 

 Collin, D. D. ivith two drawings from a model, reprefenting it fold- 

 ed and nvound up, 5 I y 



LXXVI. A Defcription of the Bones depofited, ly the Prefident, in the 

 Mufeum of the Society, and reprefented in the annexed plates. By C. 

 Wiftar, M. D. Adjunft Profeffor of Anatomy, &c. in the Univer- 

 sity of Pennfylvania. 526 



TRANS- 



