SS, 
iy CONTENTS, 
Description of a new speciesof North American Quadruped. By Richard. 
Aarlen| M. D., Professor of Comparative Anatomy to the Philadelphia 
Museum, &e. 285 
Notice of a new species ‘of Salamander, (inhabiting Pennsylvania). By Ri- 
chard Harlan, M. D., &c., 286 
Facts and Observations intended to illustrate the Natural and Economical His- 
tory of the Eatable Clam of New York and its vicinity. Ina letter to 
Lewis Weston, F.R. and L. §., &c., author of a work entitled a de- 
scriptive C; atalogue of recent Shells. By Samuel L. amie and 
LL. D., &c. : dated New York, Oct. 20, 1825, . ‘ Q87 
CHEMISTRY, PHYSICS, MECHANICS, AND MISCELLANE- 
OUS. 
An account of some Eudiometers of an Improved Construction. By Robert 
Hare,sve Dt&csn. 4 2 - 2 ; % A 
General Reflections on Heat, PAS 
Remarks on Mr. Quinby’s article on Crank Motion, in the last number of this m 
Journal, . * 5 . . 
Remarks on Art. XXIV. of No. De Vol. IX. p D. 356, E Berg ID 
Experiments on Anthracite, Plumbago, &e. oh Lardner Vanuxem, . Seer02% 
Papers relating to the Fusion of Carbon, __. pet. 2 109 
Remarks on the Cutting of Steel by soft Ir ey in a letter to the Editor, from 
Thomas Kendall, Jr., . ae 127 
On the Motion of W. ater-W heels ; ‘extract of a letter from Prof. Cleaveland, 129 
Notice of the Brewster Wool Spinning Frame, in a letter from S. D. Hubbard, 
Esq., ? é : ; 3 f é : 5 : 130 
Analysis of the Ma ryland Aprolie, by George Chilton, Lecturer on Chemis- 
try, &c., : : : ‘ ist 
On the North-West Passage. By Tsaac Lea, é 3 138 
An Epitome of the Improved Pestalozzian System of Education. By William 
Maclure, Esq. 145 
Notes on Ohio. By. Dr. Hildreth, in answer to? inquiries maa by Caleb Atwa- 
water, Esq., . A 
Notice of Dr. Thomson’s first principles of C hemistry ; ; and extracts from for- 
eign letters on various subjects, addressed to the editor, . 162 
Phermometrical Observations made by President Caldweli, at Chapel Hill, 
N. C. duriug the years 1820, 1221, and 1822. Lat. 359 54’. Communi- 
. cated by Prof. Olmsted, : % . 294 
Notices of the excessive heat during seme @ parts of the late summer, (1825) 296 
Notice of the Peninsula of Michigan, in relation to its Topography, Scenery, 
Agriculture, Population, Resources, &c. By James Pierce, Esq. 304, 
Notes on certain parts of the state of Ohio. sh Dr. Hildreth.’ Continued 
from page 162 of this volume, . 319 
Anthracite Coal of Pennsylvania, &e Remarks upon its Properties and Eco- 
nomical Uses. By the se é : 4 “ ‘ 5 : P) ok 
Topaz, - : : i : : ¢ 352 
Notice of certain processes in the arts. Communicated to the Editor in a let- 
ter from an American gentleman, dated Glasgow, Nov. 25, 1825, gag 
Tluminating Gas from Cotton Seed, . : : : : 2 : ; 362 
Laboratory | Occurrences, : : : ‘ : . , ; : + 365 
Notice of two halos with parhelia, ‘ : : : 368 
Notice of Literary and Scientific Societies i in the United States, «>. | . BAD 
