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the magnitude of the unfhaded part remained, at the inftant of 
the increafed tranfparency, what it was, when the fatellite firft 
difappeared. But, as this is not the cafe, as the unfhaded part 
is continually growing lefs,- the fatellite cannot re- appear, un- 
lefs the increafe of tranfparency be fuch, as to overbalance the 
diminution of light made by the progrefs of the eclipfe. And 
the motion into the fhade is fo quick, that this can rarely, if 
ever, happen. By the like reafoning, fits of extinction are not 
to be expected, when once the fatellite hath (hewn itfelf in an 
emerfion. 
The author of thefe remarks doth not imagine, that any 
apology is necefl'ary for the liberty he hath taken. He hath the 
higheft opinion of the merit of Mr. Bailly’s invention; and this 
hath excited him, to contribute what he could, to obviate ob- 
jections, and to prevent miftakes. 
XXVI. A 
