CONTENTS. Vll 



Page 

 M, Berzelius's Thorite, a new Mineral, and Thorina, a new 



Earth 392 



Comparative Analysis of Bones— Action of ^ther on Sulphate 



of Indigo 393 



Combustibility of Carbon increased by Platina and Copper — 

 M. Orfila on Mr. Smithson's Mode of detecting Mercury. . 394- 



On Phosphoric Acid, by M. Gay-Lussac 395 



New Patents 396 



Meteorological Observations 397 



. made by Mr. Booth at the Gar- 

 den of the Horticultural Society at Chiswick, near London, 

 by Mr. Giddy at Penzance, Dr.Burney at Gosport, and Mr. 



Veall at Boston 399 



Calendar of the Meetings of the Scientific Bodies of London 

 for 1829-1830 'tOO 



NUMBER XXXVL— DECEMBER. 

 Prof. Bessel on the Plans, Arrangements and Methods, pro- 

 posed and used by Mr. F. R. Hassler, with a view to an ac- 

 curate Survey of the Coast of the United States 401 



Prof. Bessel on the Calculations requisite for predicting Occul- 



tations of Stars by the Moon 4-10 



Dr. Stokes on some Optical Phasnomena 416 



Mr. Bevan's Experiments on the Modulus of Torsion 419 



Caleb Mainspring on the System of Chronometers at Green- 

 wich 424 



Prof. Schultes on the Cultivation of Botany in England 428 



Mr. De la Beche's Sketch of a Classification of the European 



Rocks 440 



Mr. Children's Abstract of the Characters of Ochsenheimer's 

 Genera of the Lepidoptera of Europe, &c. {concluded) .... 451 



New Patents 444 



Meteorological Observations 465 



made by Mr. Booth at the Garden 



of the Horticultural Society at Chiswick, near London, by 

 Mr. Giddy at Penzance, Dr. Burney at Gosport, and Mr. Veall 



at Boston 467 



Index 468 



