372 



Presents. 



[Feb. 6, 



Lines in 

 wave-lengths. 



Frequency 

 in chromo- 

 spliere. 



Behaviour. 

 Eeveisal in our 

 tubes. 



Kemarks. 



Potassium. . 7,670 \ 

 7,700 J 

 4,044 \ 

 4,042 J 





 3 



Strongly reversed. . . . 



Chief rays. 

 Well marked. 





Caesium 5,990 



4,555 



10 

 10 







Strongly reversed. . . . 



Most marked. 



In a subsequent communication we intend to examine carefully the 

 contents of the preceding table. In the meantime we may remark 

 that the group calcium, barium, and strontium, on the one hand, and 

 sodium, lithium, magnesium, and hydrogen, on the other, seem to 

 benave in a similar way in the chromosphere of the sun. 



Presents, February 6, 1879. 



Transactions. 



Freiburg im Breisgau : — ISTaturforschende Gesellschaft. Berichte 

 iiber die Verhandlungen. Band VII. Heft 2, 8vo. 1878. 



The Society. 



Leipzig : — Fiirstlich Jablonowski'sche Gresellschaft. Preisschriften. 

 XXI. Dr. Pohlmann, Die Wirthschaftspolitik der Florentiner 

 Renaissance und das Princip der Yerkehrsfreiheit. roy. 8vo. 

 1878. The Society. 



Melbourne Royal Society of Victoria. Transactions and Pro- 

 ceedings. Vol. XIII, XIV. 8vo. 1878. The Society. 



Modena : — Societa dei Naturalisti. Annuario. Anno 12. disp. 3-4. 

 8vo. 1878. The Society. 



Nijmegen : — Xederlandsche Botanische Vereeniging. Xederlandsch 

 Kruidkundig Archief. Verslagen en Mededeelingen. Tweede 

 Serie. 2 e Deel 4 e Stuk ; 3 e Deel l e Stuk. 8vo. 1877-78. 



The Society. 



Stockholm : — Kongl. Vetenskaps Akademie. Ofversigt . . af For- 

 handlingar. 35te Arg. No. 3-5. 8vo. 1878. The Society. 



Plymouth : — Plymouth Institution and Devon and Cornwall Natural 

 History Society. Annual Reports 1855-56, 1856-57. Annual 

 Reports and Transactions 1857-58, 1859-60, 1861-65. Vol. II, 

 III, IV, V, VI. Part 1. 8vo. 1855-78. The Institution. 



