The CONTENTS. 
the communicating the Eleftric Virtue to Non* 
elcdrics; by Wm. Watfon, F. R. S. p. 3 s 8- 
X. Abflratt of a Letter from Mr. VV. Arderon, F.R.S. 
to Mr. Henry Baker, F. R. S. concerning the per- 
pendicular Afcent o/’Ecls. p. 395.. 
XI. A Differtation an thofe fpjfil figured Stones called 
Belemnites; by Mr. E. Mendez da Cofta. p. 397. 
XII. A Letter from R. Brocklesby, M.D. and F.R.S. . 
to the Prelident, concerning the Indian Poifon ,fent 
over from M. Coudatnine, Member of the Acad. 
of Sciences at Paris. p. 408. 
XUI. A Letter from Mr. R. Dunthorne, to the Rev.. 
Mr. Mafon, concerning the Moon’r Motion, p.412. 
XIV. Extraft of a Letter from Mr. Leonard Euler, . 
Member of the Imp. . Society at Petersburgh, to the : 
Rev. Mr. Wetftein, Chaplain to His R. H. the 
Prince of Wales, concerning the Difcoveries of the 
Ruffians on the North-Eafi Coaft 0/A.fia. . p. 421.. 
XV. Abftrattofa Let ter from Mr.W. Arderon, to Mr. . 
H. Baker, concerningfome Obfi made on the Banfticle 
or Prickleback, and alfo on Fiffi in general.. 424. 
XVI. A Suppofition how the white Matter is produced, 
which floats about in the Air in Autumn 5 in a Let - 
ter from Mr. Arderon to Mr. Baker. p. 428, 
XVII. Some Remarks on the precious Stone called the 
Turquoife ; by C. Mortimer, Sec. R.S. &c. p. 429. 
XVIII. A Defer ip t ton of a curious Echinites, by Mr. 
Henry Baker, F. R. S. p. 432. 
ERRATA. 
N®. 48 1. p. 299. 1. 9. for vs read fz- for 20 r. zi 
