TABLE OF CONTENTS 



TO THIS THIRTY-FIRST VOLUME. 



JANUARY, 1812. 



Engravings of the following Subjects: 1 . Delineations from Nature, illustrative 

 of the Mechanism of Leaves, by Mrs. Agnes Ibbetson. 2. Mr. Allan's 

 Mathematical Dividing Engine. 



I. On the Mechanism of Leaves. In a Letter from Mrs. Agnes Ibbetson 1 



II. Improvement in a Mathematical Dividing Engine: by Mr. J. Allan of 

 Blewit's Buildings, Fetter Lane - - " - - 5 ■ 



III. Observations on the Waste that Pulverization occasions in Substances ; by 

 Mr. Henry, Chief of the central Pharmacy of civil Hospitals, &c. 9 



IV. Analysis of some ancient Alloys in the Church of Goslar: by Mr. Klaproth 



11 



V. An Account of a vegetable Wax from Brazil : by William Thomas Brande, 

 Esq. F. R. S. - - - - - - 14 



VI. Observations on the Alkaline Oxalates and Superoxalates, and particularly 

 on the Proportions of their Elements: by Mr. J. E. Berard - 21 



VII. Observations on the Acetate of Alumine: by Mr. Gay-Lussac 33 



VIII. Meteorological Journal - - - - 36 



IX. Observations on some of the Strata in the Neighbourhood of London, and 

 on the Fossil remains contained in them: by James Parkinson, Esq., Member 

 of the Geological Society - - - - 38 



X. Various Observations respecting the Art of Glassmaking, with a View to 

 .explain some Phenomena, that occur in the Fabrication of Glass, and point 



out the Application of these to the obtaining of new Products: by Mr. 

 Guyton-Morveau ----- 53 



XI. Analysis of Olefiant Gas : by Mr. Theodore de Saussure - 6& 



XII. Abstract of a Paper on the mutual Action of Metallic Oxides and alkaline 

 Hydrojulphurets: by Mr. Gay-Lussac - - - 74 



XIII. On the Ore of Platina of St. Domingo: by Mr. Guyton-Morveau 77 

 Scientific News - - - - - 78 



FEBRUARY, 



