280 Miscellaneous Intelligence. 
continuous spectra which contained the whole of the colors of the 
spectrum; what I should term the tails, not the trains, of the nuclei 
presented the appearance I have described, every instance I 
i) 
knife edges so as to define any lines. But I think it may be Aa 
sible to use a prism in connection with a cylindrical lens. _ Su 
Royal Astronomical Society, Jan. 11, . 
4. National Academy of Sciences,—At the recent January 
meeting of the Academy, held in Washington, the following pa- 
pers were read, 
On the practical character of the usual thermometer scales, and 
& common substitute for them; by A. Guyot. ees 
e use and interpretation of single and double linear associa- 
tive Algebras ; by’ Benjamin Peirce. 
n the existence of a great central zone of fracture of the sur- 
face of the globe; by A. Guyot. 
communication respecting the cosmical theory of the Novem- 
ber meteors; by A. C. Twining. 
.The history of a week in the life of a young Salmon; by L. 
Agassiz, 
. On the Fauna of the Gulf of Mexico at great depths; by L. 
* 
_ Kemarks on the Buffalo of North America; by L. Agassiz. 
On the penetration of sound; by Joseph Henry. he 
Some points in the geological development of the continent be- 
tween the Rio Grande and Arkansas river; by John L, LeConte. 
nk a reflector to be used as a signal in ne Pte operations; by 
standard meter of the “Conservatoire des Arts et 
aris, In the summer of 1867; by F, A, P. Barnard. 
Se ee eee eT ~ Oe er 
