viii CONTENTS. 
XVIII. An Account of an uncommon large Hernia, in 
a Letter from Dr. George Carlifle, to the Right 
Rev. the Lord Bifop of Carlifle, F. R. S. p. 133. 
XIX. Three Papers , containing Experiments on j addi- 
tions Air , by the lion. Henry Cavendifh, F. R. S. 
p. 1 4 1 . 
XX. A farther Account of the Pol i ill Cochineal: from 
Dr. Wolfe, of War flaw. Communicated by Henry 
Baker, F. R. S. p. 184. 
XXL Some further Intelligence relating to the Jaculator 
Fife, mentioned in the Philofophical Tranf action s for 
1764, Art. XIV . from Mr. Homme], at Batavia, 
together with the Defcription of another Species , by 
Dr. Pallas, F. R. S. In a Letter to Mr. Peter 
Collinfon, F. R. S. from John Albert Schlofler, 
M.D.F.R.S. p. 186. 
XXII. An Account of an Amphibious Pipes , by John 
Ellis, Efquire , F. R. S. to the R oval Society, p. 189. 
XXIII. Obfervations upon Animals, commonly called 
Amphibious by Authors. Prefented by Dr. Parfons, 
F. R. S. p. 193. 
XXIV. An Account of fome peculiar Advantages in the 
Structure of the Afpera Arteries, or Wind Pipes , of 
fever al Birds, and in the Land-Tor toife. p. 204. 
XXV. A Letter from Mr. William Mountayne, 
F. R. S. to the Right Honourable James Earl of 
Morton, P ref dent of the Royal Society , containing 
fome Obfervations on the Variation of the Magnetic 
Needle, made on Board the Montagu Man of War , 
in the Tears 1760, 176.1, and 1762, by Mr. David 
Rofs, Surgeon. p. 216. 
XXVI. A Letter to the Prefidcnt of the Royal Society , 
containing a new Manner of meafuring the Velocity 
2 of 
