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to confiderable heights ; which will afford them a 
greater chance of making their obfervations free from 
clouds, which ufualiy fkirt the horizon, as well as of 
making them to advantage. 
Prefently after I had meafured the diftance of 
Venus from the fun’s limb, the clouds returned again, 
and prevented me, not only from making any more 
obfervations of the fame kind, or meafuring Venus’s 
diameter, but alfo, what was of much more confe- 
quence, from obferving the laft internal contadl of 
Venus from the fun’s limb, which was the principal 
obfervation of all. About 23 minutes after eight, the 
clouds feparated again, and the fun appeared very 
bright and clear ; but there was not the lead: appear- 
ance to be feen of Venus, though I thought myfelf 
in a manner fure of obferving at leaff: the external 
contadl, as all the calculations make the end to hap- 
pen much later. 
Mr. Waddington took the paffages of Venus and 
the fun’s limbs, acrofs the horizontal and vertical wire 
of the equal altitude inftrument. All the obfervations, 
which he was able to make, are as follow : 
June 6, 
Mean time, in the morning. 
H.M. S. 
7 24 
7 27 43 i 
28 504 
19 9 i 
O ’s lower limb at horizontal wire. 
7 24 18 $ ’s centre at vertical wire. 
S ’s centre at the horizontal wire. 
? ’s preceding limb touches vertical wire. 
O ’s fubfequent limb at vertical wire. 
H. 
