CONTENTS. 
vn 
native ’table of the correfponding Qbfervations of the 
Firjl Satellite , made in the principal Obfervatories. 
p. 162 
XI. A Method of finding the Value of an infinite Series of 
decreafing Quantities of a certain Form , when it con- 
verges too Jlowly to be fummed in the common Way by 
the mere Computation and Addition or Subtra&ion of 
fome of its initial terms . By Francis Maferes, Ef quire , 
F. R. S. Curfitor Baron of the Exchequer. p. 1 87 
XII. tranjlation of a Paffage in Ebn Younes; with fome 
Remarks thereon : in a Letter from the Rev. George 
Coftard, M. A. Vicar of Twickenham, to the Rev. Sa- 
muel Horfley, LL.D. Sec. R. S. p. 2,31 
XIII. Obfervations on the Annual Evaporation at Liver- 
pool in Lancafhire ; and on Evaporation confidered as a 
tefi of the Moifiure or Drynefs of the Atmofphere. By 
Dr. Dobfon of Liverpool. Communicated by John 
Fothergill, M. D. F. R. S. p. 244 
XIV. An Account of Perfons who could not difiinguijh Co- 
lours. By Mr. Jofeph Huddart, in a Letter to the Rev. 
Jofeph Prieftley, LL.D. F. R. S. p. 260 
XV. Anew theory of the Rotatory Motion of Bodies ajfeCled 
by Forces difiurbing fuch Motion. By Mr. John Lan- 
den, F. R. S. p. 266 
XVI. Directions for making the befi. Compofition for the 
Metals of reflecting telef copes ; together with a Defer ip- 
tion of the Procefs for grinding, polifhing , and giving 
the great Speculum the true parabolic Curve. By Mr. 
John Mudge; communicated by Alexander Aubert, 
Efq. F. R. S. p. 296 
XVII. Ex- 
