Miscellaneous Intelligence. 495 
IV. MIscELLANEOUS SCIENTIFIC INTELLIGENCE. 
1. National Academy of Sciences.—The following is a list of 
papers registered and read at the meeting of the National Acad- 
Sciences, at Washington, April 20-28, Ren 
of et LeConte. sang Vision; Laws of Ocular M 
W. gee —l, 1, Hollow W. ter-Spo uts and aes ry a 
0: rm) 
Metaceclogy. 
; LS Packard.—On the Structure of the Brain of Limulus polyphemus. — - 
ngley.—1. on an Instrument for Measuring Radiant Heat.—-2. On the 
Composition of Colo: 
 eragrnes ap Agassiz. 7._—The Sea Urchins ~ ‘ay? ne Expedition. 
O. C. Marsh.—Size of the Brain in Extin 
W. pibts —On New alt ie Inorganic Acids 
T. Sterry Hunt.—On the nic System n Geolo, ogy. 
F. M. Green, U.S. N.—On the Recon Determinations of Longitude by the 
i pees Hydrographic Office 
hd Todd.—On the ‘Announcement of the Discoveries of Intra-Mercurial 
ph. 
Cini by Tele 
Wm. Harkness.—On the Solar Coron 
E. s. Holden.—On the Nebula of Oni ion. 
Theo. N. Gill.—-On the Distribution of the Zenopsis ieee 
Josiah P. Cooke.—Revision of the Atomic wou of Ant 
a 
—On = effect of rein trains vs  sanemiting ri through 
the ground ia regards ect on observations ed observ 
Albert A. Michelson. or the saci dential? suffered by Tight ‘on passing 
through a very narrow slit. 
J. Lawrence Smith—-Some remarks on the rr ia nature of the Sun’s Corona; 
and, also, oh 1 a supposed new Meteoric silica 
Stephen Alexander.—On some modern aevekiplacaty bearing upon the pene 
Hypothesis and other shelton connected therewith, as well as on some previ 
changes, and miscellaneous notices. 
2. Emmet County Meteorite: Supplement to the article on 
page 459, by the author, J. ee cE Smira.—When my paper 
was sent to press, the fo ilo wing new facts in connection with this 
meteoritic fall had not been discovered. I am indebted for them 
meteor yeaa’ over them, a ieee shower of what ees : 
them hailstones fell, and that the, surface of the water was aliv 
with the falling bodies. Three weeks ago (April 15th) the people 
of that neighborhood began to find, on the freshly burnt prairies, 
small pieces of meteorites from the size of a pea to one pound in 
weight ; 300 to 500 were thus found ; and ten days ago (May Ist) 
thousands of men, women and children were on the ground daily, 
and from the meteoric field probably five thousand pieces have 
already been gathered, making in all a weight of not less than 
from 60 to 75 pounds. 
