[ '93 ] 
the glades, and one of the wires placed parallel to the 
horizon, and confequently the other was vertical ; the 
other eye-piece was alfo a combination of two glades,, 
and adapted to a micrometer, the glades being placed 
between the wires of the micrometer and the eye of 
the obferver, and was to be ufed when the telefcope 
moved in a plane parallel to the equator. 
Mr. Short’s houfe, in Surry-ftreet, being fo dtu- 
ated as not to fee the fun at ridng, the Rev. Dr. 
Birch, Secretary of the Royal Society, was pleafed to 
allow us the ufe of his leads on his houfe in Norfolk- 
flreet, from whence we fhould be enabled to fee the 
fun foon after he rofe. We chofe the doctor's leads, 
that we might not be far from Mr. Short’s clock, 
which was eadly within call, in order to compare a 
fecond-watch, which we made ufe of, with the clock, 
at every obfervation. 
About half an hour after 4 o’ clock in the morn- 
ing of the 6th of May, Dr. Bevis and Mr. Short went 
to Dr. Birch’s houfe, where the following obferva- 
tions were taken with the above rededting telefcope 
moving parallel to the horizon, and the eye-piece 
with the wires at right angles ; Dr. Bevis obferving, 
and Mr. Short writing down the times. 
h / " 
5 20 
20 29 
22 94 
22 33 
2 3 l 9 
24 o 
By Mr. Short’s clock. 
I. 
© upper limb at the horizontal wire. 
© preceding limb at the vertical wire. 
2 center at the vertical wire. 
2 center at the horizontal wire. 
O fubfequent limb at the vertical wire. 
© under limb at the horizontal wire. 
B b 
II, 
