ii CONTENTS. 



VIII. Observations concerning the Milk of Cows labour- 

 ing under an Epidemic Disorder called Cocote, 

 together with general considerations concerning 

 such matters as may injuriously affect the Ani- 

 mal Economy, and be discovered in the diseased 

 products, or in the atmosphere or water. Pre- 

 sented to the Academy of Sciences by the Chemi- 

 cal Section, M. Chevreul, Reporter, . HI 



1. Question coucerning the nature of organic matter, 113 



2. Coucerning the natm-e of those substances of tlie exter- 



nal world which exert an iufluence ujion organized 

 beings, . . . • • • 120 



3. Consequences which may be deduced from the foregoing . 



considerations, . . . • • 128 



IX, On the Respiration of Plants. By Messrs Edwards 



and Colin, . . . .126 



X. Elementary Considerations of some Principles in the 

 Construction of Buildings designed to accommo- 

 date Spectators and Auditors. By John Scott 

 Russell, M.A., F.R S.E., &c. Communicated 

 by the Society of Arts, . . . 131 



XI. Researches in Embryology. Second Series. By 



Martin Barry, M.D., F.R.S.E., M. W.S., &c., ] 37 



XII. Notice of Remarkable Agitations of the Sea at the 

 Sandwich Islands, on 7th November 1837. By 

 T. Chas. Byde Rooke, F.R.C.S., . . 141 



XIII. On Photography. By Andrew Fyfe, M.D., F.R.S.E., 



&c. Communicated by the Society of Arts, 144 



1. Methods of preparing the paper, . . 14.5 



2. Methods of taking the Impressions, . . 147 



3. Presci-vation of the Impressions, . . 150 



4. Method of taking Impressions in which the lights and 



shades are not reversed, . . . ] 53 



XIV. Notes on Daguerre's Photography. By Sir John 

 RoBisoN, Sec. R. S. Ed., &c. Communicated by 

 the Society of Arts, . . . 155 



XV. Note by Dc Daubeny to his Memoir, contained in 

 the Edinburgh New Philosophical Journal for 

 April 1839, in Reply to Professor Bischof's Re- 

 marks on the Theory of Volcanos. Communi- 

 cated by the Author, . . . 158 



