during the years 1826 and 1827. 133 



twice in the atmosphere. In the evening the sheet lightning 

 appeared with uncommon splendour, and at the same time a 

 very brilliant meteor passed through the north-west, in size and 

 colour exactly resembling Venus, which was not far off, in beau- 

 tiful conjunction with Jupiter. I had occasion to notice the 

 luminosity of the sea as being very different from any thing I 

 have observed either on the west or east coast of Scotland. It 

 reminded me instantaneously (and indeed it resembles nothing 

 else that I am acquainted with) of the splendid light emitted in 

 the burning of silver leaf by galvanism. 



In August the weather continued unremittingly oppressive. 



September 7th. — -At Trent, during the evening, a most tre- 

 mendous thunder-storm took place, attended with lightning of 

 various colours, and of incredible brilliancy. 



In the beginning of October the autumnal rains set in, which 

 they do regularly at this period in Italy. 



November 22d. — A tremendous thunder-storm occurred at 

 Naples in the evening. See my paper on the Climate of Naples 

 in this Journal for October 1827. 



November 29th. — On the occasion of the eclipse of the sun 

 this day, I made a variety of thermometrical experiments, which 

 have been published in No. xv. of this Journal, p. 166. 



The following register kept for one month will give an idea 

 of the weather at Naples in November and December last. 



Nov. NAPLES. Wind. Therm. 



14. Showery and cloudy, S. W. 10 m. 59 



15. Dull and showery, 10 m. 65 



16. Rainy day, 10 m. 56 



17. Fine day, and clear, S. W. 10 m. 61 



18. Delightful day, S. W. 10 m. 60 



19. Rain last night ; fine forenoon ; some 1 ") 



torrents of rain afternoon, and then >-S. M * 



rather cloudy, ) 10 A * 59 



20. Very fine day, Var. 10 m. 57 



21. Fine morning ; heavy rain forenoon ; ) TT 



n A fVar. 11 m. 56 



very fine atternoon, j 



22. Very rainy forenoon ; fine afternoon, S. 10 m. 55 



23. Rainy and unpleasant day, S. 11 m. 56 



