\ 
454 _ Scientific Intelligence. 
depths; by Wm. Srimpson, M.D.—In a paper on the Diatomacee 
found in wud collected at great depths from the bottom of the sea 0 
elow 
ttom. The experiment was successful; the quills coming 
etly filled with mud of the usual character occurring at such d 
in such latitudes. One of the quills having been submitted to me 
-microscopic examination, was carefully wiped and cut in 
middle, in order to secure for examination a specimen, as nearly as pos- 
sible free from any chance admixture from the water near the surface. 
In this specimen I found an abundance of diatoms, some of which, ap- 
ae Coscinodisci, appeared to me to be undoubtedly living, judging 
rom their fre: t 
sh a ; 
It is exceedingly doubtful whether sufficient light can penetrate to = 
great a d to i 
are suppose to require for their existence and multiplication. ' 
alee kaos, it is by no means certain that some amount of light does 
not so penetrate, and, if we deny the existence of vegetable life in these 
