X 
CONTENTS. 
XXXIV. De Problem ate quodam Algebraico , deque 
Fvolutione Mechanic ce cujufdam Curvce inter inf - 
nit as hyper mechanic as, quee deter min at a ccquationi 
fatisf admit. Auctore Pio Fantoni, Mathematico 
Bononienfi. Communicated by Sir Horace Mann, 
His Majejly s Envoy at Florence. p. 358. 
XXXV. A Memoir concerning the mcjl advantageous 
ConftruBion of Water-wheels , &c. by Air. Mallet 
of Geneva : Communicated by M. Maty, M. D. 
Sec. R. S. Tranfiated from the French, by J. Bevis, 
Al. D. R. S. S. p. 372. 
XXXVI. A new Method of confiruBlng Sun-Dials , 
for any given Latitude , without the Affiance of 
Dialing Scales or Logarithmic Calculations. By 
James Fergufon, F. R. S. p. 389. 
XXXVII. On the Formation of Iflands. By Alex- 
ander Dairy m pie, Efquire : Communicated by C. 
Morton, M. D. S. R , S. p. 394. 
XXXVIII. An Attempt to determine the Height of the 
Sun's Atmofphcre from the Height of the Solar 
Spots above the Suns Surface : In a Letter 
to Mr. John Ellicot, F.R.S.from the Reverend 
M. Horfley, F. R. S. p. 398. 
XXXIX. Obfervations of the Suns Eclipfe, 1 6 th of 
Auguft, 1765, taken at Caen in Normandy. By 
Nathaniel Pigott, E fquire> of Whitton, in Mid- 
dlefex: Communicated by J. Bevis, M. D. F. R. S. 
p. 402. 
XL. Exrabl of a Letter from John Ellis, Efquire , 
F. R. S. to Dr. Linnaeus, of Upfal, I\ R. S. on 
the Animal Nature of the Genus of Zoophytes 
called Cor allin a p. 404. 
XLI. An Account of the Aclinia Sociata } or clufiered 
Animal Flowery lately found on the Sea-Coafis of 
1 the 
