viii CONTENTS. 



SUPPLEMENT TO VOL. XXIV. 



Engravings of the following Objects: 1. Various Delineations and Sections of 

 Grafts and Buds, from original Drawings after Nature, by Mrs. A<nres 

 Ibbetson. 2. Branch of a Portugal Laurel, from which the Bark had been 

 accidentally separated. 3. Different Structures of several Kinds of Wood. 



I. Memoir on the Triple Sulphnret of Lead, Copper, and Antimony, or En- 

 delhon. By M. le Comte de Bournon, F. R. and L. S. - 321 



IL On the Effects produced by the grafting and budding of Trees. In a Letter 

 from Mrs. Agnes Ibbetson. - 337 



III. On the Defects of grafting and budding. By Mrs. Agnes Ibbetson. 346 



IV. Experiments on Ammonia, and an Account of a new Method of analyzing 

 it, by Combustion with Oxigen, and other Gasses; in a Letter to Humphry 

 Davy, Esq. Sec. R. S., &c, from William Henry, M. D. F. R. S., V. P. 

 of the Lit. and Phil. Society, and Physician to the Infirmary at Manchester. 



358 



V. Observations on the Composition of Ammonia. By Mr. Berthollet, jun. 



374 



VI. Analysis of the Chinese Rice-Stone, with some Observations on the Yu. 

 By Mr. Klaproth. ----- 375 



VII. On the Effect of westerl) Winds in raising the Level of the British Channel. 

 In a Letter to the Right Hon. Sir Joseph Banks, Bart. K. B. P. R. S. By James 

 Rennel, Esq. F. R, c>. - - „ 379 



VIII. On Dead Lime. By Mr. Bucholz. - - - 381 



IX. On the Muriates of Barytes and of Silver. By Berthier, Mine Engineer. 



383 



ERRATUM. 

 Page. line. 

 278 14 for Theoric read Calcul. 



