CONTENTS 



OP THE 



THIRTY-THIRD VOLUME. 



RESULT of some Experiments on the Distillation of vari- 

 ous Vegetable and Animal Substances .. .. 3, 116 



Description of a Portable Bridge .. . 10 



Analysis of some Iron Ores in Burgundy and Franche-Comte ; 

 to which is added an Examination of the Pig Iron, Bar 



Iron, and Sconce, produced from them 12 



On Hydrophobia . . . . • . 24 



On Deal Pendulum Rods 30 



Method of hastening the Maturation of Grapes . . 32 



New Method of training Fruit Trees 35 



Proposed Improvement of the Hygrometer .. .. .. 39 



Materials for a History of the Prussiates 42 



Observations of a Comet, made with a View to investigate 

 Us Magnitude, and the Nature of its Illumination . . 56 



On Commerce .; ' .. 68 



Memoir upon t/ie Vineyards and Wines of Champagne in, 



France 77,142,227 



Mr. Davy's Theory 86, 87 



On Barometrical Measurements . . 97 



A Letter on the Alterations that have taken place in the 

 Structure of Rocks, on the Surface of the basaltic Coun- 

 try in the Counties of Derry and Antrim . . 102, 194 

 Hydraulic Investigations, subservient to an intended Croo- 

 nian Lecture on the Motion of the Blood . . . . 1 23 

 Analysis of the Schist that accompanies the Menilite near 



Paris ., » 134 



Comparative Analysis of some Varieties of Steatite . . 136 



Method of painting Linen Cloth in Oil Colours, to be more 



pliant, , durable, and longer impervious to Water, than in 



the usual Mode 151 



Experiments , on various Earths, undertaken with the View 

 of ascertaining whether they are metallic Oxides .. 157 

 Proposal for altering the Scale of the Thermometer .. 166 

 On the Difference "between the Products obtained by Distil- 

 lation of recent and of dried Vegetables . . . . 167 

 Report on a Manuscript Work of M* Andre, formerly 

 Vol. 33. 1809, a known 



