CON 
NTS 
T E 
T O 
V O L. LI. PARTI. 
% 
I. <r T~H E great eft LffeCl of Engines with uniformly 
accelerated Motions confdered. By Francis 
Blake, Efqy F. R. S. p. i. 
II. QhJ'ervations on the Growth of Trees: By Robert 
Marlham, of Stratton in Norfolk, Efq ; Commu- 
nicated by the Rev . Steph. Hales, D. D. F.R. S. 
r .P-7- 
III . An Account of fome Antiquities found in Corn- 
wall : In a Letter from the Rev. William Borlale, 
M. A. F. R. S. to the Rev. Charles Lyttelton, 
LL. D. Dean of Exeter. p. 13. 
IV. Anew improved Silk-Reel. By the Rev. Samuel 
Pullein, M. A. p. 21. 
V. Experiments on feveral Pieces of Marble ftained 
by Mr. Robert Chambers. In a Letter to the Rev. 
Tho. Birch, D. D. Secret. R. S. from Mr. Emanuel 
Mendez da Cofta, F.R.S. p. 30. 
VI. ObJ'ervations upon the Sea Scolopendre, or Sea 
Millepes. By John Andrew Peyffonel, M. D. 
F. R. S. Tranflated from the French p. 35. 
VII. An Account of a Storm of Thunder and Light- 
ning at Norwich, on the 13 th of July 1758. By 
Mr. Samuel Cooper. Communicated by Mr. Jo- 
A ieph 
