TABLE OF CONTENTS 



TO THIS THIRTIETH VOLUME. 



SEPTEMBER, ]8li. 



Engravings of the following Subjects: Various Figures, in two 8vo Plates 



'3!lT""^ the Hans and minute Cryptogami^ ol PlaMs, greaSy magnified; 



; and delineated from Nature, by Mrs. A.Ibbetson. . o'""^"* 



I. On the Hairs of Plants. In a Letter from Mrs. Agnes Ibbetson i 



n. Inquiry concerning the Natural Economy of Ants. In a Letter from a 

 Correspondent - - . . . 10 



HI. Report of a Committee, consisting of Messrs. Berthollet, Chaptal Vau- 

 quehn, Le Breton, Vmcent, and Guyton-Morveau, appointed by the Institute 

 - to mquire concernmg the Process of the late Mr. Bachelier, for the Com- 

 position of a preservative Stucco - , . "^ 



^^^,^^'1'"^^^^°"^ ^"^ Experiments on Pus. By George Pearson, M D 

 t.R.b. - . . . _ . J- 



^o^nvimnri^J° r^ ^'7 Gas With a Reply to Mr. Murray's last Observations 

 on Oximuriatic Gas : by Mr, John Davy - - . ^S 



VI Method of preparing a beautiful and permanent White for Water Colours. 

 In a Letter from Mr. Grover Kemp - . -33 



VI [. The Natural History of Clouds. By Luke Howard, Esq. - 35, 



VIII. An Account of the Thunder-storms on the I9th of August. In a Letter 

 irom 1 homas Forster, Esq. - . . . qc, 



,IX. Meteorological Journal - - . , g^ 



X. Abstract of a Memoir on the Analysis of Vegetable and Animal Substances- 

 by Messrs. Gay-Lussac and Thenard . - . . gg 



XI. Chemical Examination of a white filamentous Substance, found in the 

 Mr!Tauq°ielt ' '°"'^''^ '^^'''' '° *^' ^^^'' °^" ^'gh I^ "niaces : by 



■^F;n^F'HT"^''^*,^^T>^"''"h°^^PP'^- In ^Letter to Henry Grimston, 

 ±-sq. F. H. S. By the Rev. John Simpson - - . 70 



^"i ^ji^'^^'^T^T "^ ""i 'T ^PP^ ^""^^ ^h^ Spring-Grove Codling. By 

 the Right. Hon. Sir Joseph Banks, Bart, K. B. P. R. s! &c. - 77 



Scientific News - . ^ „ .-o 



OCTOBER, 



