iv CONTENTS, 
Page 
Arr. X.—On the Azotized Nutritive Principles of Plants. By 
Prsfessor LAEBIG 2.4.0.6. /F 2... asa se oan edie 2a 244 
Akt. XI.—Memoir on the Theory of Light. By M. A. L.Caucuy 264 
Art. XII.—Researches on the Cacodyl Series. By Professor 
Rup. Bunsen of Marburg ....%.....-- ia aes «ate ae 281 
Art. XIIJ.—On numerous Animals of the Chalk Formation which 
are still to be found in a living state. By Dr. C. G. Enren- 
BERG oer ck does «6:3 Sethe iweleve DE at aoe aoela eae ee HS 
ARTO RIM (continugd.)\ o.oo oc aon ne ee ele wes aie oe 345 
Art. XIV.—An Inquiry into the Cause of the Electric Pheenomena 
of the Atmosphere, and on the Means of collecting their Mani- 
festattons; By M.A: Perrier 2.0220 2.25 00s eee ae 377 
Art. XV.— On the Cause of the Differences observed in the Ab- 
sorbing Powers of Polished and of Striated Metallic Plates, 
and on the application of these Principles to the Improvement 
of Calorific Reflectors. By M. MELLONI ..........0++- 416 
Art. XVI.—On Vision, and the Action of Light on all Bodies. 
By Professor Lupwic Moser of Konigsberg ..........-. 422. 
Art. XVII—Some Remarks on Invisible Light. By Professor 
Lupwic Moser of Konigsberg. .... 5 ..5:s sows o oegeeaen 461 
Art. XVIII.—On the Power which Light possesses of becoming ° 
Latent. By Professor Lupwic Moser of Konigsberg .... 465 
Art. XIX.—Abstract of some of the principal Propositions of 
Gauss’s Dioptric Researches ....... ote ndr = 4s oh el 490 
Art. XX.—An Account of the Magnetic Observatory and Instru- 
ments at Munich: extracted from a Memoir entitled ‘ Ueber 
das Magnetische Observatorium der Koénigl. Sternwarte bei 
Minchen, von Dr. J. Lamont,’ Director of the Observatory 499 
PART XII. 
Art. XXI.—Proposal of a new Nomenclature for the Science of 
Calorific Radiations. By M. MELLonI ...............: 527 
Art. XXII.—Memoir on the Constitution of the Solar Spectrum, 
presented to the Academy of Sciences at the Meeting of the 
13th of June, 1842, by M. Epmonp BecqueREL.......... 537 
