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CONTENTS OF VOLUME XLIV. 
NUMBER XXX. 
Art. I. On Perfect Harmony in Music, the Double Diatonic Scale, 
and an Enharmonic Key-Board for oa Piano-fortes, ete. ; 
by Henry Warp Poots, 
II, A Sketch of the Heology of Southwestern Towa’ a. 6. A. 
Wairs, M.D., 
IIL. Notes on the Gaia of Sone: by Fr. V. gre, weet 
IV. On the systematic value of Ps Sa rompianil by 
Joun L. LeCorrs, M.D., 
V. On the Morphological value ae scien: of the eas 
Hand; by Burr G.. Wizper, 8.B., M.D., - 
VL On the Classification of the subdivisions of McCoy’s ‘Gam 
Athyris, as determined by the laws of zoological nomencla- 
ture; by E. Briitnes, = - 
Lgie Wepetieadnts on Itacolumite (Articulite), with the Miplaaben 
of its flexibility and its relation to the formation of the Dia- 
mond; by Cuartes M. Weruerm1, Ph.D,M.D., -  - 
VIIL. On the Laws which govern the general disteibution of Heat 
over the Earth, and on Brewster's Neutral Point; by Puy 
Earie Caase, - - - - - - - - 
TX. Contributions toward a sia “of ss iegammert ” M. 
Carey Lz 
A, 
X. Contributions to ie Cheminsy ‘of Dita; a Obi ss A 
Gorssmann, Pb.D., 
XI. Notice of a new genus of fossil Sponges a the ioe sil | 
rian; Bd O. C, Marsx, P 
. 4 Crystallog phi Peck stg : ner 
D. Dana. No. IV, On a connection between Crystalline 
Pt and Chemical omepeeain with some inferences there- 
: st t. Glaciers of of Alaska Russian 0 Amerion; ay Wana P. 
LAKE, - 
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