inu CONTENTS, 



SUPPLEMENT TO VOL. XXXII. 



Engravings of the following Subjects : 1. A Potato, with the Methods of tak- 

 ing Sets from it tor preventing the Curl, by Mr. T. Dickson : 2. Diagram 

 illustrative of Electric Attractions and Repulsions, by J. C. Delametherie. 



3. Diagram illustrating the Law of Evaporation, by" lionore Flaugergues. 



4. Different Modes of constructing the Breech of a Gun, so as to make it 

 throw the Shot close, or scattering, by a Correspondent. 5. An improved 

 Scarificator, by Mr. John Fuller. 



I. Observations on the Disease in the Potato, generally called the Curl ; point- 

 ing out the most probable Method of preventing it ; with an Account of the 

 Results of a few Experiments made on the Subject. By Mr. Thomas Dick- 

 son, LeithWalk, Edinburgh. 321 



II. Electric Attractions and Repulsions are not explained in a satisfactory Man- 

 ner in the Hypothesis of Two Fluids. By J. C. Delametherie - 328 



JIf. Memoir on the Proportion the Evaporation of Water bears to the Humidity 

 of the x\ir. By Honore Flaugergues .... 330 



IV. Remarks on the Construction of Fowlingpieces, pointing out Methods by 

 -which they may be made to throw Shot very close, and the contrary. In a 

 Letter from a Correspondent ----- 333 



V. Description of an improved Scarificator: by Mr. John Fuller, No. 14, 

 Hatton-Garden ---------- 340 



VI. On a Case of nervous Affection cured by Pressure of the Carotids ; with 

 some physiological Remarks. By C. H. Parry, M. D. F. R. S - 345 



VII. A concise View of the Theory respecting Vegetation, lately advanced -in 

 the Philosophical Transactions, illustrated in the Culture of the Melon. By 

 T. A. Knight, Esq. F. R. S. - - - - - 350 



VIII. Some Remarks on pruning and draining standard Apple and Pear Trees. 

 By Mr. John Maher, F. H. S. - - - - - - . 355 



XI. On the Advantages of employing Vegetable Matter as Manure in a fresh 

 State. By T. A. Knight, Esq. F. R. S. Pres. H. S. - - 357 



X. Abstract of a Paper on the tanning Substances formed by the Action of 

 Nitric Acid on several Vegetable Matters. By Mr. Chevreul - 360 



XI. Chemical Examination of the Husks of Walnuts. By Mr. Henry Braconnot, 

 Prof, of Natural History, ike. 374 



XII. Analyses of Minerals. By Martin Henry Klaproth, Ph. D., &c 379 

 Index - - - 385 



A JOURNAL 



