The C O NTE NTS. 
cup with two handles , and publijhed with a 
draught of the cup hy Dr . Pococke, in his 
Defcription of the Eaft, Vol. II. Part 2. 
pag. 207. By John Ward, Prof.Rhet. Grelh . 
andF.R.S. p. 488 
XVII. A Letter from Mr . Henry Baker 
F. R. S. to the Prefident, containing Ab~ 
JlraSls of fever al Obfervations of Auroras 
Boreales lately feen. * p. 499 
XVIII. A Defcription of a Mariner’s Com- 
pafs, contrived by Gowin Knight M. B. 
F. R. S. p . foy 
XIX. An Account of fome Improvements of 
the Mariners Compais, in order to render 
the Card and Needle* propofed by DoBor 
Knight, of general Ufe , by John Smeaton, 
Philofophical hijlrument-snaker . p. 513 
XX. The Defcription of #Fifh, Op ah Guinien- 
lium, fhewed to the Royal Society by Mr * 
Ralph Bigland. p. 5 1 8 
XXL A Letter fro?n John Burton M. D. to 
C. Mortimer M.D. & Seer. R. S. concern- 
ing the Extirpation of an Excrefcenc zfrom 
the Womb. p. 720 
