TranfU of Mercury. ^^9 



lead to farther difqulfnion, and will much oblige a lover of 

 aftronomv, who is a coiidant reader of your Philotophical 

 Magazine *. 



jipparent Time. 



Firft contaa with the light part at c - \\^ 



Central contact - - - J i 



Hud of contact - - -11 



Firll contaft of Mercury with the fun's limb 11 



Central contact - - - 11 



End of con tart - - - li 

 Mr. Til loch. 



From another Correfpondent. 



Nov. 8, 1802. — At 20h. 15' apparent time, having fitted 

 a prifmatic dark, glafs to an achromatic tclefcope of Dol- 

 lond's, magnifying^about 65 or 70 times, I faw .Mercury upon 

 the fun's dilk/extrcmely diltin6t, and well defined. As Mer- 

 cury was then approaching very fall towards the fun's centre, 



" This corrtrponticnt is requcftcd to fnrnifh us whh the loiigiiude 

 and latitude of hii obCervatory, the method by which he afcertained h S 

 time, and tlic nature and puwef of the tplefcopc he made ufe ot. 



and 



