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XXVI. A 'Letter from Mr. James Short, 
F. R. S. to the right honourable the Far l 
of Macclesfield, Prefident , concerning a Pa- 
per of the late Servington Savery, Efq\ 
relating to his Invention of a new Micro- 
meter. 
My Lord, 
Read May 10, *¥"T is now above a year fince I received 
* 753 - a l e tt er f r0 m the Rev. F. Pezenas, 
profeffor of hydrography to the French King at Mar- 
feilles, in which he informed me, that M. Bouguer 
had read, before the Royal Academy of Sciences at 
Paris, in the year 1748, a memoir, in which he de- 
fcribes an heliometer ; which is an inftrument, con- 
fining of two objective glaffes, for meafuring the dia- 
meters of the planets. He faid alfo, that this memoir 
was actually in the hands of M. de Fouchy, Perpetual 
Secretary of the Academy, or at the Royal Printing- 
houfe ; and that it was register'd in the minutes of the 
Academy for the year 1748. 
Immediately after reading this letter, I recollected 
to have heard a paper upon the fame fubjedt from 
the late Servington Savery, of Exeter, Efq; read be- 
fore the Royal Society, about the year 1743. I there- 
fore had recourfe to the minute-book of the Society 
for that year, where I found the following minute, 
which I copied in the prefence of the right honour- 
able the Lord Charles Cavendifh, then Vice-Pre- 
fident : 
sc 
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