CONTENTS. 
I. On the Ring of Saturn , and the Rotation of the fifth Satellite 
upon its Axis. By William Herschel, LL.D. F.R.S. Page 1 
II. Miscellaneous Observations. By William Herschel, LL.D. 
F.R.S. p. 23 
III. Experiments and Observations on the Production of Light 
from different Bodies, by Heat and by Attrition. By Mr. 
Thomas Wedgwood ; communicated by Sir Joseph Banks, 
Bart.P.R.S. p. 28 
IV. Experiments upon Heat. By Major-General Sir Benjamin 
Thompson, Knt. F.R.S. In a Letter to Sir Joseph Banks, 
Bart. P.R.S. p. 48 
V. A new Suspension of the Magnetic Needle, intended for the 
Discovery of minute Quantities of Magnetic Attraction : alsa 
an Air Vane of great Sensibility ; with new Experiments on 
the Magnetism of Iron Filings and Brass. By the Rev. 
A. Bennet, F.R.S. Communicated by the Rev. Sir Richard 
Kaye, Bart. F.R.S. p. 81 
VI. Part of a Letter from Mr. Michael Topping, to Mr. 
Tiberius Cavallo, F.R.S.; with an Account of the Mea- 
surement of a Base Line upon the Sea Beach , near Porto 
Novo, on the Coast of Coromandel. P- 99 
