IV 



On the Transmission of the Actinic Rays of Light through 

 the Eye, and their relation to the Yellow Spot of the 

 Retina. By George Wilson, M.D., . . 371 



Donations to the Lihrary, . . . . 375 



Monday, ^Ist April 1856. 



On the Prismatic Spectra of the Flames of Compounds 



of Carbon and Hydrogen. By William Swan, Esq., 376 



On the Laws of Structure of the more disturbed Zones of the 

 Earth's Crust. By Professor H. D. Rogers, of the 

 United States, . . . . 378 



On a Property of Numbers. By Balfour Stewart, Esq, 



Communicated by Professor Kelland, . . . 390 



Analysis of Craigleith Sandstone. By Thomas Blctxam, 

 Esq., Assistant-Chemist, Industrial Museum, with a 

 Preliminary Note by Professor George Wilson, 390 



Donations to the Library, . . . . 395 



