478 Scientific Intelligence. 
The configuration found of 9 magnets begins the secondaries ; 
and this configuration has 2 for its nucleus. The secondaries 
have for nuclei the stable primaries, i. e. pachlaesedcts numbered 
2, 3, 4, 5a, 6a, 7 and 8a. The tertiaries have the secondaries for 
nuclei ; the quaternaries, the tertiaries, ete. 
the configuration be made with the superposed magnet at a 
constant vertical oe it will be a — _— the same 
II. Grotocy anp MINERALOGY. 
1. Supplement to the Second Edition of Acadian Geology ; by 
J. W. Dawson, LL.D., F.R.S. 102 pp.*—This publication con- 
tains the new matter added to the third edition of “Acadian 
Geology,” just issued ; and which is published separately in this 
form for o~ _— of those who alre ady possess the second edi- 
tion. It reviews the new facts which have been discovered in the 
Maritime Peesurs of the Dominion of Canada since 1868. 
ginning with the later deposits, the author endeavors to vindicate 
by new facts his former conclusion that the cold of the Glacial 
eae was not connected with a a glacier, but with 
ocal glaciers on the higher lands and ice-drif ft by Arctic currents 
over the plains, then en weee se nee the Post-pliocene 
deposits as follows, in ascending ord 
(a.) Peaty sevréetriat surface schcnee = bowlder clay. 
‘a Lower stratified gravels and sands. 
{e. stare elay and neater sands with bowlders. Fauna, 
present, extremel 
(d.) kiwis] Austins laclay, witha se Eon number of nthe oe Arctic shells, 
such as are now found only in perm tly ice-laden 
(e.) Upper indd clay and sand, or ada: ron Oe holding many 
ote or boreal shells similar to those of the Labrador 
few littoral shells, of bore 
After some notice of the Trias, aksemabety developed in Prince 
Edward Island, where it has afforded the remains of one Dinosau- 
rian Reptile. and several land plants, and which in Western Nova 
Scotia is so remarkable for its great. a beds, a large spac 
is devoted to the Carboniferous, and more especially to the recog- 
‘nition of an Upper “ Permo-carboniferous ” or perhaps truly Per- 
* New York: Van Nostrand. We are indebted for this notice to Dr. Dawson, 
the author of the work. 
tp 
(f-) demic: sand and gravel, send ee or with a 
r Acadian types. 
