[ 3^3 ] 
XXXI. Extra Si of a Letter from Mr. 
Mallet, of Geneva, to Dr. Bevis, F. R . S. 
Read June 2 1,"!" HAD the pleafure of writing you a 
few lines in the month of Auguft, laft 
year, when I fent you my obfervations relative to the 
tranfit of Venus, which the Peterfburg Academy has 
printed without my knowledge, whilft I was yet in 
Lapland. I left Rufiia foon afterwards, and have 
been five or fix months in my own country. Part 
of this time I have employed in reducing and com- 
puting my obfervations made in the North, to get 
what ufeful refults I could from them, which I have 
juft now fent to Peterlburg, to be printed in the 
Commentaries of the Academy. As it may be fome 
time before that volume will be publifhed, I thought, 
Sir, you might be willing to be informed of fome of 
the principal conferences refulting from my ob- 
fervations. 
i°. To determine the latitude of Ponoi, where I 
obferved the tranfit, a great number of meridian al- 
titudes of the ftars and Sun, taken with a quadrant 
of 2 feet radius, made at London by Mr. Sifi’on, 
gave the elevation of the pole 6 y° 04' 30". I was 
not able to make any other obfervation but that of 
the Sun's eclipfe, on the 4th of June, for determin- 
ing the longitude. I obferved with a 1 2 feet achro- 
A a a 2 made 
