é CONTENTS. 
Page 
marks, in commendation of Professor Fisher’s 
proportionally tempered Douzeauve, by Mr. John 
Frarey, senior - - - = - 65 
MEDICAL CHEMISTRY. 
VIII. Abstract and translation of Dr. F. Magendie’s 
late Publication on Prussic acid, by the Editor, 
with remarks = - - - - - 81 
PHYSICS, MECHANICS, CHEMISTRY, anp Taz ARTS. 
1X. Description of a Machine invented by David 
Bushnell for submarine navigation and for the de- 
struction of ships of war, with an account of the 
first attempt with it to destroy some of the British 
ships lying at New-York, by Charles Griswold, 
Esq. 94 
X. Remarks on ‘the Revolving Steam Engis ab Mo- 
rey, by Mr. Isaac Doolittle - 101 
XI, Mr. Sullivan on the Revolving Steam Engine, in 
reply to Mr. Doolittle - 106 
XII. Observations on the Dry Rot, by Col. George 
Gibbs - 114 
XI. On Heat and ae (first communication) by 
Mr. Samuel Morey - 118 
XIV. On Heat and beh isegond communication) 
by the same 122 
XV. On some curious ‘and ingulor appearances of 
snow and hail, by the Rev. D. A. Clark - 132 
XVI. Remarks on Hans Bere Dust, in reply to Mr. 
Rafinesque 134 
XVII. On the existence of Cau anidih in the Lytta 
Vittata or Potatoe Fly, by Dr. I. F. Dana 137 
INTELLIGENCE AND MISCELLANIES. 
1. American Geological Society = - 139 
2. Curious Geological Facts - - 144 
3. Professor N. Stith on Fossil bones found in red 
sand stone - = - - 146 
