vi CONTENrS. 



A Description of a New iNSTRUMENx/or mea- 



Juring the Specific Gravity of Bodies. By 



Mr. William Nicholson; in a Letter to 



Mr. J. H. Magellan, F. R. S. Reg. Acad. 



Petrcpol.et Paris Correfp.l^c. - - Page 386. 



Memoirs of the late Dr. Bell. /?y James Currie, 

 M.D. addrejfed to the Presidents (J«<^ Members 

 of the Literary and Philosophical Society 

 0/ Manchester - - P. 397. 



y^ Translation of Dr. Bell's Thesis, de Phy- 

 sioLOGiA Plantarum. By James Currie, 

 M.D. - - - - P. 410. 



Some Observations on the Phenomena which 

 take Place between Oil and Water : In a Let- 

 ter to Thomas Percival, M. D. &c. By 

 Martin Wall, M.D. Prale5for of Chemijlry 

 in the Univerfity of Oxford - - i^. 435. 



Facts and Queries relative to Attraction and 

 Repulsion. By Thomas Percival, M.D. 

 yc. p. 445- 



Extracts of two Letters from Dr. Wall of 

 Oxford to Dr. Percival, in Reply to the 

 foregoing Queries concerning Attraction 

 a'lid Repulsion. Communicated to the Literary 

 and Philofophical Society of Manchefier P. 455. 



On the voluntary Power which the Mind is 

 able to exerc'ife over Bodily Sensation. By 

 Thomas Barnes, D. p. ^ P. 467. 



^ Narra-* 



