1883.] Lihrary. 89 



tbe observations were corrected by the values so obtained, and annual means 

 computed from the corrected monthly means. 



The annual values for the years of observation thus arrived at were 

 as follow ; — 



Year 1876 1877 1878 1879 1880 1881 1882 



Corr. rad. ) 80-05 82-60 82*67 8123 8023 7912 77-11 

 temp. ) 

 and it was pointed out that the last minimum of sunspots having occur- 

 red in 1878, the results indicated a considerable variation of the solar heat 

 concurrently with the sunspot variation, with a maximum at the sunspot 

 minimum. 



In reading the paper Me. Blaneord remarked that the results were 

 very striking and symmetrical, but were diametrically opposed to those which 

 he had arrived at by his own rougher method of investigation published 

 in 1876. They were opposed also to the conclusions to be drawn from Mr. 

 Norman Lockyer's spectroscopic researches, and from the barometric varia- 

 tion which he had described in the Society's Journal and in * Nature.' 

 This discrepancy must be recognized and left for future investigation 

 since at present it is impossible to attempt any reconciliation. There 

 were some assumptions necessarily made by Mr. Hill as to the constancy 

 of the haze factor, and that to which he had recently drawn attention, viz.y 

 the high diffused cloud which contributed to the pallor of the sky was 

 also necessarily omitted. And there might well be other disturbing causes 

 not yet suggested. Meanwhile Mr. Hill's was a very careful and valuable 

 contribution to the evidence, and awaited explanation. 



This paper will be published in the Journal, Part II, 1883. 



f 



IBRARY. 



The following additions have been made to the Library since the 

 Meeting held in March last. 



Transactions, Proceedings, and Journals, 



presented hy the respective Societies and Editors. 

 Baltimore. Johns Hopkins University, — American Chemical Journal, Vol. 



IV, No. 5, January, 1883. 

 ' ■ ■ American Journal of Mathematics, — Vol. V, No. 2. 



Bombay. Indian Antiquary,— Vol. XII, Parts 141-142, February and 



March, 1883. 

 Bordeaux. Societe de Geographic Commerciale,— Bulletin, Nos. 3-4, 1883. 



