CONTENTS. 
wl 
Academies of Bruffels and Caen, and Correspondent of 
the Royal Academy of Sciences at Paris. p. 637 
XXXI. Obfervations on the Scurvy. By Charles De Mer- 
tans, M. D. Dated Vienna, Jan. 14, 1778. p. 66t 
XXXII. Comparifon between Sir George Shuckburgh and 
Colonel Roy’s Rules for the Meafurement of Heights with 
the Barometer ; in a Better to Col. Roy, F. R. S. from 
Sir George Shuckburgh, Bart. F. R. S. p. 681 
XXXIII. An Account of the Calculations made from the 
Survey and Meafures taken at Schehallien, in order to 
afcertain the mean Denfity of the Earth. By Charles 
Hutton, Efq. F. R. S. p. 689 
XXXIV. An Account of the Blue Sharks together with 
a Drawing of the fame. By W. Watfon, fun. M, D. 
F.R.S. p. 789 
XXXV. A Defcription of the Exocoetus Volitans, or Fly- 
ing Filh. By Thomas Brown, Surgeon, near Glafgow. 
Communicated by Dr. Fothergill, F- R. S. p. 791 
XXXVI. Reafons for dijfenting from the Report of the 
Committee appointed to confider of Mr. Wilfon’s Expe- 
riments’, including Remarks on fome Experiments ex- 
hibited by Mr. Nairne. By Dr. Mufgrave, F. R. S. 
p. 801 
XXXVII. Experiments on EleBricity , being an Attempt to 
Jhew the Advantage of elevated pointed ConduSlors. By 
Mr. Edward Nairne, F. R. S. p. 823 
XXXVIII. On the Ufe of an Amalgam of Zinc , for the 
Purpofe of eledlrical Excitation , &c. By Bryant Hig- 
gins, M. D. in a Letter to Richard Brocklefby, M. D. 
F.R.S. p. 861 
XXXIX. 
