- CONTENTS. Vil 
' Page. 
ArT. XXIV.—On certain Combinations of a New Acid formed of 
Azote, Sulphur, and Oxygen. By J. Petouze ..... . 470 
Art. XXV.—An Attempt to explain the Absorption of Fiche: ac- 
cording to the Undulatory Theory. By Baron Fapran von 
Wreve (Ss RRR RRR SMS ae AS (Pg TEENS RNR 7 AF 
PART IV. 
Art. XXV.—(continued.) . . 483 
Art. XXVI.—On the Anplidasion ae lectin: Migeneniany in ie 
Movement of Machines. By M.H. Jacost, Taga of Science, 
and Professor at the University of Dorpat ........ 503 
Note on the Application of Electro-Magnetism as a Miehaniesk 
Power. By I. D. Borro, Professor of Natural Philosophy in 
the Royal University of Turin ...... 532 
Part of a Lecture on Electro-Magnetism, Selivescd, oa tie Phi- 
losophical Society at Zurich, nee the 18th, 1833. By the 
late Dr. R. ScHULTHESS ...... . 554 
On the Influence of a Spiral nantdeae in Hiveiete athe incon 
sity of Electricity from a Galvanic Arrangement of a Single 
Pair, &c.- By Professor Henry, of New Jersey, U.S. .... 540 
Art. XXVII.—A singular case of the Equilibrium of Incompres- 
sime Pinids: By M. OstroGRADSKY...........2...... 548 
Art. XXVIII.—On the Origin of Organic Matter from simple 
Perceptible Matter, and on Organic Molecules and Atoms ; 
together with some Remarks on the Power of Vision of the 
Human Eye. By Prof. C. G. EHRENBERG .... 555 
Art. XXIX.—On the Application of Circular Polaris ¢ to ae 
ganic Chemistry. By M.M. Bior and CuEevreut . 584: 
On the Application of Circular Polarization to the Aes x 
the Vegetation of the Graminee. By M. Biot .......... 584 
Examination of an Optical Character, by which, according to 
M. Biot, Vegetable Juices capable of producing Sugar ana- 
logous to Cane Sugar, and those capable only of producing 
Sugar similar to Grape Sugar, may be immediately distin- 
guished. By M. CuEevreuL ...... bio} 
On the Application of the Laws of Giscnae Palerieation in file 
Researches of Chemistry. By M. Bior ...... 600 
Art. XXX.—On the Laws according to which the Manet aoe 
upon a Spiral, when it is suddenly approached to or removed 
from it; and on the most advantageous Mode of constructing 
Spirals for Magneto-Electrical purposes. By E. Lenz .... 608 
