1877.] 



Presents. 



121 



declination-curve there is a well-marked depression perhaps a month later. 

 Finally, there is a depression in the temperature-curve corresponding to 

 the beginning of July 1867, and one in the declination-curve correspond- 

 ing to the middle of August. I have not been able to notice any marked 

 coincidence between the temperature-range and the sun-spot curves. 



Without attempting to decide the question, it appears that there is at 

 least some preliminary evidence in favour of an alliance between the 

 three phenomena, solar spotted area, terrestrial meteorology, and terres- 

 trial magnetism, of such a nature that the variations of the former precede 

 those of the other two in point of time. It will be seen that this is a 

 question of much importance ; for if there be a connexion of this nature, 

 once its laws are known, it may become possible to foresee the character 

 of impending meteorological changes. These points, however, can only 

 be determined by further investigations. 



I desire, before concluding, to thank Mr. ¥m. Dodgson, who has given 

 me much assistance in the calculations and diagrams of this paper. 



The Society then adjourned over the Easter Eecess, to Thursday, 

 April 12. 



Presents received, March 1, 1877. 



Transactions. 



Bordeaux : — Societe de Medecine et de Chirurgie. Memoires et Bul- 

 letins, 1875 fasc. 3, 4. 8vo. Bordeaux 1876. The Society. 

 Societe des Sciences Physiques et Naturelles. Me'moires. 2 e Serie. 

 Tome 1. Cahier 3. 8vo. 1876. The Society. 

 Innsbruck : — Naturwissenschaftnch-mectizinischer Yerein. Berichte. 



Jahrgang VI. Heft 2. 8vo. 1876. The Society. 



London : — Chemical Society. Journal, 1876, July to Dec, with Pro- 

 ceedings, Index, &c. ; 1877, Jan., Feb. 8vo. The Society. 

 Entomological Society. Transactions for the year 1876. Part 2-4. 



8vo. The Society. 



Institution of Civil Engineers. Minutes of Proceedings. Session 

 1876-77. Part 1. Vol. XLVII. 8vo. 1877. The Institution. 

 Eoyal Asiatic Society. Journal. New Series. Vol. IX. Parti. 8vo. 



1876. The Society. 



Eoyal Horticultural Society. Journal, edited by the Eev. M. J. 

 Berkeley. Vol. IV. Part 16. 8vo. 1877. The Society. 



New York : — American Geographical Society. Bulletin. Session 

 1873-74. No. 8 ; 1875-76. No. 1. 8vo. 1874-76. 



The Society. 



