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XLIII. A Demonjlration of ’Two Theorems mentioned m 
• ^ * . <• 
Art, XXV. of the Philofophical Tranfa£lions for the 
Tear 1775. In a Letter from Charles Hutton, Ffq. 
F.R. S. to the Rev. Dr. Horfley, Sec. R. S. 
TO THE REV. DR. HORSLEY, SEC. R. S. 
REV. SIR, 
Woolwich Warren, Royal Mil. AcaJ. 
April 17, 1776. 
I 'll E following is a demonflration of the 
two theorems mentioned in Art. XXV. 
of the Philofophical Tranfa£tions for the year 1776. 
If you think them proper to he inferted in the next 
volume of Tranfa6lions, be pleafed to communicate 
them to the Royal Society for that purpofe, from, Sec, 
II f 7 . 
THE 
