466 Scientific Intelligence. 
above apparatus. Air, R. :2377, W. 237; carbonic acid, R. 20438, 
W. -208; hydrogen, R. 3409, W. -3431; ethylene, R. gives -4147 
sa ) 
‘401. The agreemens is therefore very satisfactory.— Bib. Univ., 
‘ BO BP: 
Il. GEoLoey snp Naturat History. 
ence of elevated beds of coral detritus “round several parts of 
Hawaii, about twenty feet above the level of the sea.” The writer, 
as Mr. Darwin states, saw hardly any reefs about the island, the 
only point mentioned in my report being the vicinity of Hilo. 
reply to an enquiry by me on the subject, the Rev. Mr. Coan, 
long a resident of Hilo, and, as missionary, a traveler over various 
parts of the island of Hawaii, makes the following statement in a 
letter dated Hilo, October 26th, 1874. Mr. Coan is a careful ob- 
server of natural objects and phenomena, aud has written much 
leanos. 
on the Hawaiian volea 
vated coral-reef rock, and there are large areas in the district of 
Waianae and other portions of the Oahu shores; but there is 
and all the good specimens we get are obtained by diving 
Small quantities of broken corals are washed ashore by the 
waves.” 
Oahu reefs are described by me in my Exploring Expedition 
briefly men- 
e 
Geological Report, pp. 251-256. The facts are more briefly 
tioned in my work on Corals and Coral Islands. J. D. DA 
2. Drift in Kansas ; by Rev. M. . Knox. (From a lette 
to J. D. Dana, dated Sept. 24, Baldwin City.)—The drift in ; 
sas is confined mostly to the northern half of the State, little 
having been found any distance south of the great Kansas Valley. 
North of this river, especially in the region north an west of 
a. there are drift rocks of vast size. The prevalent kind 
np is | 
diameter; yet in the northeast fourth of the State, one may 
ride twenty miles over the prairies and not see one of 80 large 
| ders and pebbles are everywhere to be found 
conglomerate and trap; the mass is red quartzite, On the high — 
prairie, these boul 
