[ l6 7 1 
upon the fame fubjeCt, dated Nov. 30, 1743 ; and 
a copy of this letter fhall be delivered, if commanded 
by the Society, as a farther proof of the authenticity 
of Mr. Savery’s paper. I am, 
My Lord, 
Your Lordfhip s moft obedient, 
Surrey-ftreet, May 10, 
I 753 * and moft humble fervant, 
James Short. 
A new Way of meaf tiring the Difference be- 
tween the apparent Diameter of the Suit at 
the 'Times of the Eartti s Perihelion and 
Aphelion , or when the Sun is nearer to or 
farther from the Earthy with a Microme- 
ter placed in a Telejcope invented for that 
Purpofe ; tho the Charge or magnifying 
Power of the lelefcope is fo great , that the 
whole Sun s Diameter does not appear therein 
at one View : By Servington Savery, of 
Exeter, Efq\ mention d in Mr. ShoA s pre- 
ceding Letter . 
Readoa. 2 7, / | ^ LI IS, I doubt not, will, at firft fight, 
174j JL ftem impoftiblej fince only a part 
of the diameter appears, and no vifible mark or point 
therein, from which fuch meafure can be taken : and 
indeed it is fo by obfervations with our common tele- 
fcopes, whether dioptric or reflecting ones. 
I have 
