1877.] 



Presents. 



181 



pose that the light received from our own sun is but a fraction of the 

 total light received from a supposed atmosphere of enormous extent sur- 

 rounding him (a supposition which needs only to be stated to be rejected), 

 instead of constituting the main portion of the total light, it follows that 

 the total light received from a distant cluster formed of stars at all 

 resembling our own sun must mainly come from the stars themselves. 

 If, then, it be true, as it undoubtedly is, and as Mr. Stone has urged, 

 that at a sufficient distance the light from any individual star is insigni- 

 ficant, while that from the cluster as a whole (both stars and atmospheres) 

 is not, this can only be by the distance being so great that the small but 

 finite solid angle subtended by a small portion of the slit employed in the 

 investigation is nevertheless sufficient to take in a considerable number 

 of the stars ; and if this be admitted, Mr. Stone's reasoning falls to the 

 ground. 



Presents received, April 12, 1877. 



Transactions. 



Amsterdam : — Koninklijke Akademie van Wetenschappen. Verhande- 

 lingen. Deel XVI. 4to. 1876. Afdeeling Letterkunde. Deel X. 

 4to. 1876. Yerslagen en Mededeelingen. Afdeeling Naturkunde. 

 Tweede Eeeks, Deel X. 8vo. 1877. Afdeeling Letterkunde. 

 Tweede Eeeks, Deel V. 8vo. 1876. Jaarboek voor 1875. 8vo. 

 Processen-Verbaal van de gewone Vergaderingen 1875-76. 8vo. 

 Hollandia, Carmen. 8vo. 1876. Catalogus van de Boekerij. 

 Deel III. Stuk 1. 8vo. 1876. The Academy. 



Cardiff : — Naturalists' Society. Annual Eeports and Transactions. 

 . 1867-68 to 1875. 8 parts. 8vo. Cardiff. 



William Adams, C.E., Vice-President of the Society. 



Christiania : — Kongelige Norske Erederiks Universitet. Aarsberetning 

 1873, 1874. 8vo. Die Pflanzenwelt Norwegens, von F. C. Schii- 

 beler. 4to. 1875 (and map). Norges Piske, af E. Collett. 8vo. 

 1875 (and map). Eesearches on the Structure and Affinity of the 

 Genus JBrisinga, by G. O. Sars. 4to. 1875. On the practical 

 application of Autography in Zoology, by Gr. O. Sars. 8vo. Trans- 

 fusion und Plethora, von J. W. Miiller. 8vo. 1875, Quellen zur 

 Geschichte des Taufsymbols und der Glaubensregel 3. 8vo. 1875. 

 Enumeratio Insectorum JNTorvegicorum, auetore H. Siebke. fasc. 2. 

 8vo. 1875. Porhandlinger i Videnskabs-Selskabet. Aar 1874. 8vo a 

 1875. Nyt Magazin for Naturvidenskaberne. Bind XXI., XXII. 

 Hefte 1. 8vo. 1875-76. The University. 



Dublin : — Eoyal Irish Academy. Proceedings. Vol. VI. 8vo. Dublin 

 1858. The Academy. 



