vl CONTENTS. 
PROF. WM. HALLOCK. 
A New Photographic Method of Comparing the Pitch of Tuning Forks 
(CAIOSTRAGEI Grog Soe Cass ans ontoe concn cect aes Seckee oc aaaeae ss caee tan coer etna ae eee eee 76 
Bolometrie Researches in the Infra-red Spectrum of the Sun (abstract in 
“Serene! % Anes, 16; -1895, pi. VR tise Uc 4G laa sed ee ans penne poet meee 93° 
PROF. G. S. HUNTINGTON. 
The Cervical Plexus of the Cynomorphus Apes (not printed)............. 222 
PROF. J. F. KEMP. 
Mesabi Iron Range of Minnesota (not printed)....................ceeeeeeeee eee 47 
Sketch of the Igneous Rocks in the Province of Quebec and the States of 
New York, Vermont, New Jersey, Pennsylvania and to the South 
(nob primted))s..:.0sc5 so comamereatenscecs ae occ stele sone: cot tales isonet anette ept ee 219 
The Iron-ore Bodies at Mineville, N. Y. (not printed )....................008 262 
EDWARD M. KINDLE. 
The South American Cat-fish belonging to Cornell University [By title, 
‘printed tnvAnmals WNP 249) ire Mose asc tacas aver sticcn ee te saaeemntoneanese 21 
G. F. KUNZ. 
The Minerals Used in the Manufacture of the Babylonian, Assyrian and 
Sassanian Seals ( Abstract in Science, March 8, 1895, p. 279).......... 87 
L. MI. LUQUER, 
On the Relative Effects of Frost and Sulphate of Soda Efflorescence as 
Shown by Tests of Building Stones. (Not printed by the Academy. 
The reference in the text is wrong ; it should be Trans. Amer. Soe. 
LV 5, ERT, 5) Sosy stated sonesc aus tnees eee oeataan Sree sheen eee 67 
W. D. MATTHEW. 
Sketch of the Igneous Intrusions of New Brunswick, Nova Scotia and 
Newilound lands (mot printed.) Pcs. cucsscerne spose stoee aoatineeemcnaecmerstiesies 219 
A. P. MATTHEWS. 
On the Mechanism of the Secretion of the Gland Cells. (Not printed).. 94 
J. A. MATTHEWS. 
Notes on Carborundum. . (Not published by the Academy. Printed in 
the School of Mines Quarterly, November, 1894, p. 73) ..............0e5 67 
PROF. A. M. MAYER. 
On the production of Beats and Beat-tones by two vibrating bodies, 
whose frequencies of vibration are so great as to surpass the limit of 
audibilibys (abstrach)<<.cssececeeonssctereermnaeesoseness soe aeteane ameter scammers 47 
On Chladni’s figures formed on vibrating plates strewn with sand (not 
10) 96010600 0) eRe Se ere Ree errors eh Pine Eoanins care saadadcascbcngaccoanodson dw coGos 70 
