vi CONTENT S. 
IV. Fxtrabl of a Letter from Mr. George Wichell, 
E. i?. S. and Majier of the Royal Academy at 
Portsmouth, to Charles Morton, M. D. Sec. R. S. 
inclojing fome Account of a Solar Eclipfe obferved at 
George’s Kland, by Captain Wallis; and feveral 
Afronomical Obfervations made at Portfmouth. 
V. Extras cf Mr. T. Barker's Regijler at Lyndon 
tn Rutland, in a Letter to James Weft, Efq. Prcf. 
P‘ S. p ^ , 
VI. Dvrechons for ufing the common Micrometer, 
taken from a Paper in the late Dr. Bradley’s 
Hand-Writing ; communicated by the Rev. Nevil 
t Mafkelyne, Aftronomer Royal , and F. R. S. p. 46 
VII. A Letter from Mr. John Rein hold Fortier, 
P. R. S. to William V/atton, M. D. giving fome 
Account of the Roots ufed by the Indians, in the 
Neighbourhood of Hudlon’s-Bay, to dye Porcupine 
, p . 5 + 
YI1I. An Account of a Subce rated Denarius of the 
Plaetorian Family , adorned with an Erruican In- 
fer ipt ion on the Reverfe, never before pub l feed or 
explained . In a Letter to Mathew Maty, M. D. 
Sec. R. S. from the Rev. John Swinton. B. D. 
1 . R. S. Ci ft os Archivorum cf the XJniver/ity of 
Oxfoid, Member of the Academy degli Apatifti at 
Florence, and of the Etrulcan Academy of Cor- 
tona in Tufcany. p q )(y 
IX. A Deduction cf the Quantity cf the Suns Par- 
allax from the Comparifon of the feveral Obl’er- 
vations of the late Tranfit of Venus, made in 
Europe, with thofe made in George Illand in the 
South Seas : Communicated by Mr. Euler, fun. 
Secretary 
