C 356 ] 
The immerfion was noted at ix h 41™ 7* by the 
clock. I think it might be two feconds fooner, be- 
caufe the clock being of neceflity at a diftance from 
the telefcope, the inftant of the immerfion was figni- 
fied by ftriking upon a bell. The emerfion was 
about x h 31' but with fome uncertainty, the ftar be- 
ing hid by a cloud at its firft coming out. 
By the obferved tranlits of the fun and ftars, the 
clock loft three feconds between the 25 th and 28 th . 
On the 25 th , by correfponding altitudes, the clock 
was 1 ' 46", 8 too flow ; whence on the 28 th it was 
1 ' 49", 8 too flow. This confirms the obfervation 
made by correfponding altitudes on the 28 th , by 
which it was 1 ' 50" too flow at noon : the clock was 
then lofing at the rate of four feconds a day ; whence, 
on the 28 th at ix h , it was 1 ' 51", 5 flower than 
mean time. The equation of time on the 28 th at 
ix h was 2 ' 47", 5, whence the immerfion was at 
ix h 45' 44" apparent time. 
The Telefcope made ufe of was one of Dollonds, 
with a triple objed glafs of 33-!. inches focal diftance, 
and which magnifies 52 times. 
Tranfits 
