VI 
CONTENTS. 
liam Morgan; communicated by the Rev. - Richard Price, 
D. D F. It S. P -331 
XXI. An Account of a remarkable Franfpoftion of theVtfcera. 
By Matthew Baillie, M. D. In a Letter to John Hunter,. 
Efq. F. R . S. P- 35 ° 
XXII. On the Georgian Planet and its Satellites . By William 
Herfchel, LL.O. F. R. S. p. 364 
XXI 1 1 . Experiments on the Formation of Volatile Alkali , and on 
the Affinities of the Phlogijlicated and light Inflammable Airs. 
By William Auftin, M . D. Fellow of the College of Phyfi - 
clans ; communicated by Charles Blagden, M.D.Sec. R. S. 
P- 379 
XXIV. Some Properties of the Sum of the Divifors of Numbers . 
By Edward Waring, M. D. F. R. S. p. 388 
XXV. Experiments on the Production of artificial Cold. By Mr. 
Richard Walker, Apothecary to the RadclifFe Infirmary at Ox- 
ford. In a Letter to Henry Cavendifh, Efq . F.R.S. and A.S . 
P : 395 
XXVI. A Defcription of an Injlrument which , by the turning of 
a Winch , produces the Two States of EleClricity without 
Friction or Communication with the Earth. In a Letter 
from Air. William Nicholfon to Sir Jofeph Banks, Bart. 
P. R. S. P- 403 
XXVli. AbJlraCl of a Regfier of the Barometer , Thermome- 
ter. , and Rain at Lyndon in Rutland, with the Rain in 
Hampshire and Surrey, in 1787. Alfa four Account of the 
Annual Growth of Frees. By Thomas Barker, Efq. Com- 
municated by Thomas White, Efq F.R.S . p. 408 
XXVI II. On the Era of the Mahometans , called the Hejerd 
By William Marfden, Efq. F. R. S. and A. S'. 
P 4 H 
P II I* 
