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Mr. Ellicott, with the pendulum of his invention, 
having the bob fupported by levers. An agrono- 
mical quadrant, of 3 feet radius, made by Mr. 
Sillbn ; and an equal altitude inftrument, by Mr. 
Bird j each having three horizontal wires in the te- 
lefcope. A refleding telefcope, of four feet focus ; 
another of two ; and another of i foot ; fitted with 
an objedl glafs micrometer, of 2 1 1 feet focus j all 
three made by the late Mr. James Short. 
I was obliged to remove the clock to another 
apartment, for the fake of the tranfit, which I did 
on the 23d of May, when I took Ibme equal alti- 
tudes. By reafon of an almoft continual fucceffion 
of cloudy weather till the end of that month, I could 
make but few material obfervations afterwards for 
regulating the clock. But, happily, the weather 
cleared up on the ift of June, about noon, and con- 
tinued fine for feveral days. As the precife know- 
lege of the true time is of the utmoft confequence in 
the prefent cafe, I fuppofe a particular account of the 
obfervations made for this purpofe, within a few 
days of the tranfit, will be mofi: fatisfadory to you ; 
and this muft be my apology for the prolixity of the 
detail. 
Obfer- 
