614 



REPORT — 1894. 



It has been remarked in the Engadine that the amount of sunlight during the 

 ■winter months has been diminishing, but so far as I have been able to ascertain, 

 there is no accurate information upon -which a statement of this character can be 

 based. The average value per hour obtained from my experiments last year for the 

 month of January, including the bad days, amounted to 8-41 mgms. of iodine 

 per 100 c.c, per hour, -whilst, as already mentioned, the mean from the above 

 experiments, extending over a longer period, is 7-05. This shows that the average 

 amount of light was less during the 1893-4 season than during the previous one, 

 but I do not think that from the records of two seasons any deductions can 

 legitimately be made. 



I hope to make arrangements for a continuance of this-«-ork during the ensuing 

 winter, and should be glad to hear of similar -work being carried on at some of the 

 other centres in the High Alps. 



7. Interim Report of the Committee on the Formation of Haloids from 



Pure Materials. 



8. Interim Report on the Bihliograjjhy of Solution. — See Reports, p. 24G, 



SATURDAY, AUGUST 11. 

 The Section did not meet. 



MONDAY, AUGUST 13. 



1. A joint meeting with Section A was held, at which Lord Rayleigh, 

 Sec.R.S., and Professor W. Ramsay, F.R.S., gave a preliminary account 

 of a Neiv Gaseous Constituent of Air. 



