DEGLI SPETTROSCOPISTI ITALIANI 41 



meter and by M. 1 ' Loder with the same chronouieter at ll h 42 m 45 s . The corre- 

 ctioii of the chronometer being -h 15 m 55 s 42 the tiraes become. 



Tacchini ll h 58 m 42 s 4 



Loder 11 58 40.4 



M. = 11 58 41.4 



that is to say l m S 8 after the calcnlated tinie, and seeing that the coramence- 

 raeut of the Eclipse was noted after a sraall portion of the limar disc had been 

 saw, the eommencement of the Eclipse appears to have corresponded fairly well 

 with the time calculated for the chronometer. 



At the eommencement of the Eclipse the sky was quite clear at the zenith , 

 but shortly afterwards a light haze formed, and a solar halo conld be seen the 

 forernnner of the bad weather which was about to conceal the totality of the 

 Eclipse from us. In fact heavy clouds carne up from the N. W. and at half pas- 

 sed 12 the sky was already entirely covered. 



Even with these clouds the graduai lessening of the light was sensible and the 

 pheuomenon was most marked on certain distant points, which reflected toAvards 

 us a little solar light of the horizon. Wheu the totality approached below at the 

 horizon there were no clouds , and the sky was of a deep orange towards the 

 west and blen to the East , a very curious contract with the darkness we had 

 above. The time of the totality arrived. 1 remained dose to my instrument as did 

 the other observers, althongh I was already convinced that ali was lost. Towards 

 the end of totality I gave a glance at the very dark sky and noticed that the 

 totality of the Eclipse finished very nearly as I had calculated. A short time af- 

 terwards an officer of the steamer M. r Cox who in concert with captain Waterhouse 

 had noticed the following times for the eommencement and end of totality. 



Chronometr Birchall 1222 



Commencement of totality 7 h 3 m 3 S 



End of totality 7 7 41 



Duration of totality 4 38 



The correction of the chronometer being 5 h 40 m 42 8 we have 



Commencement of totality l h 22 m 21 s 



End of totality 1 26 59 



that is to say, a time only slightly differing from that calculated. 



Oiornale di Sciente Nat. ed Econ., Voi. XI. — 1875. 7 



