[ 4«4 ] 
the Strand at i h .o / > 33 // : or by a mean of both when 
reduced to the meridian of Greenwich at i h . l'.o^/f — 
The fame was obferved by the Abbe de la Caille, by 
Meff. Maraldi, Monnier, and Caffini the fon, at Paris, 
and by Mr. Caffini at Thury : which obfervations, 
whenreduced to the meridian of the Royal Obier- 
vatory, give i h .io".i 5", 5 for the time of the internal 
contad: the difference of meridians is therefore 
9'. 12". 5. By a mean of the obfervations of Mr. 
Graham and Dr. Bevis when reduced to Greenwich, 
the laft external contact on the lame day happened 
at \ h .2 f .4.2" . and by a mean of the obfervations in 
France the fame happened there at 1 h . 1 2'. 1 o". The 
difference of longitude therefore is g'.zS". N B. No 
obfervations were made of this traniit at the Royal 
Obfervatory at Greenwich, on account of clouds. 
In the year 1753 was another tranfit of Mercury, 
when the unfavourable date of the heavens a few fe- 
conds before the time of the internal contact prevented 
any obfervations from being made at Greenwich, as 
appears from a paper communicated to me by the ex- 
ecutors of the late Dr. Bradley. Both contacts however 
were luckily very well obferved, by Mr.Short, Dr. Bevis 
and Mr. Bird; by a mean of whofe obfervations reduced 
to the meridian of Greenwich the internal contact 
happened at io h . 9 '. 27"^>5‘ The fame contad was 
obferved by 13 obfervers at Paris, and was found not 
to happen fooner than io h .i 8'. 36", nor later than 
io h .i9 / .o3 // . But by a mean of all at io h .i B / -45 / '. 
The difference of meridians therefore is 9'. 07", 5. 
By a mean of the obfervations of Mr. Short, Dr. 
Bevis, Mr. Bird, Mr. Canton, and Mr. Silfon, all re- 
duced to the meridian of Greenwich, the external 
con tad 
