1879.] On the Transit of Venus. 299 



1874. December. 



Chronometer 

 Time. 



Greenwich Time. 



d. h. m. 





d. h. m. 



s. 



8 23 9 







8 17 57 



36 



11 



38 



18 



14 



12 



40 



1 



16 



15 



8 



3 



44 



16 







4 



36 



16 



57 



5 



32-6 



22 







10 



36 



34 







22 



36 



37 



30 



26 



6 



40 







28 



36 



44 



14 



32 



49-6 



Eemarks made by Observer at the Time. 



Egress. 



now changed for a red glass ; field now 

 red and less lighted than at Ingress. 

 Definition sharp and excellent. No boil- 

 ing risible around sun's limb ; some boil- 

 ing round Yenus' lower limb and still 

 less around upper limb. Eemoved the 

 red glass and substituted a blue one, 

 when the boiling round Yenus became 

 quite risible. Eemoved the temporary 

 substitute and restored red glass, as 

 before, and thus watched the farther 

 progress of the transit. 



About i of Yenus' diameter from contact. 

 No ligament visible. 



About i of Yenus' diameter from contact. 

 No ligament visible. 



About -|- of Yenus' diameter from contact. 

 No ligament visible. 



Less than of Yenus' diameter from con- 

 tact. No ligament visible. 



About -gL of Yenus' diameter from con- 

 tact. No ligament visible. 



2nd internal contact. 



Light ring now visible around Yenus' limb 



against sky. 

 No boiling around Yenus' or sun's limb. 

 Yenus' limb against sky only faintly seen. 

 Light ring has been invisible for some 



time ; was seen for only a short time 



after 2nd internal contact. 

 2nd external contact. No ligament visible 



thereafter or at any time before. 



2. This record was obtained by means of the following agency. My 

 friend, Mr. W. H. Cole, M.A., andibly counted seconds, and named the 

 minntes as completed, from a large chronometer, before which he was 

 comfortably seated, say six feet from the equatoreal. Baboo Cally 

 Mohnn Ghose, with paper and pencil, took up a position by my side ; 

 he mentally followed Mr. Cole's counting, and noted clown the instant 

 I made a remark, together with the words I uttered. In the absence 

 of remarks, the Baboo noted the number of each complete minute as 

 it was declared, a reckoning which was checked by inspection of the 

 chronometer and otherwise from time to time, so as to render the 

 adoption of a ivrong minute practically impossible. Thus all that re- 

 mained for me to do was to look intently through the telescope of the 

 equatoreal and declare exactly what I beheld. YYe three individuals 

 were all enclosed within the canvas walling of an observatory tent 



T 2 



