CONTENTS. 
Exeter, now Lord Bijhop e/’Carlifle, and F. R. S. 
from the Reverend Mr. Thomas Dawes, Chaplain 
to the FaSlory at Aleppo. p. 39. 
XIII. Obfervations on Sand Iron: In a Letter from 
Mr. Henry Horne, to Mr. John Ellicot, F. R. S. 
p. 48. 
XIV. Extrall of a Letter from Simon Peter Pallas, 
M. D. of Berlin, to Mr. Emanuel Mendez da 
Cofta, Librarian to the Royal Society , relating to 
the State of the Cold there loft Winter , dated Feb. 
12, 1763. p. 62. 
XV. An Account of a remarkable Darknefs at Detroit, 
in America : In a Letter from the Rev. Mr. James 
Stirling, to Mr. John Duncan : communicated by 
Samuel Mead, EJq ; F. R. S. p. 63. 
XVI. An Account of a remarkable Marine Inf e SI : In 
a Letter of Mr. Andrew Peter Du Pont, to Mr. 
Emanuel Mendez da Cofta, Librarian to the R. S . 
P- 57 - 
XVII. A Letter from Monfieur Wargentin, Secretary 
to the Royal Academy of Sciences in Sweden, to Mr. 
John Ellicot, F. R. S. relating to the late Lranfit of 
Venus. p. 59... 
XVIII. Remarks on the Cenfure of Mercator’s Chart , 
in a pojlhumous Work of Mr. W eft, of Exeter : In ’ 
a Letter to Thomas Birch, D. D. Secretary ' 
to the Royal Society , from Mr * Samuel Dunn. 
p. 66. 
XIX. A Defence of Mercator’s Chart againft the Cen- 
fure of the late Mr. Weft of Exeter : In a Letter to 
Charles Morton, M. D. Secret . R. S. from Mr. 
William Mountaine, F. R. S. p. 69. . 
XXI. An Account of a Species of Ophris, fuppofed to 
be the Plant , which is mentioned by Gronovius in the 
, Florae 
