ii CONTENTS. 
Art. XI. Journal of a Tour to the Coast of the Adriatiic Sea, 
and to the Mountains of Carniola^ Carinthia^ Tyrol;, 
Saltzburg, and Bohemia. By Dr David Henry 
Hoppe and Dr Frederick Hornschuch. (Con- 
cluded from p. 91 .) - - - o^g 
XII. On a New Plan of Tunnelling, being calculated for 
opening a Roadway under the Thames. By M. J. 
Brunel, Esq. F. R. S. Civil Engineer. With a Plate, 276^ 
Xni. Observations on the effects of Heat and of Motion. 
In a Letter to J. F. W. Herschel, Esq. F. R. S. 
Lond. & Edin. from M. Seguin. Communicated 
by- Mr Herschel, - 280 
XIV. Tables of the Variation of the Magnetic Needle in 
different parts of the Globel (Continued from 
p. 120.) - - - - 283 
XV. On the Forms of Crystallisation of Sulphato-tri-Car- 
bonate of Lead. By William Haidinger, Esq. 
F.R.S.E. - - . - 286 
XV 1. Notice respecting the genus Caligus of Leach. By 
George Johnston, M. D. Extraordinary Member 
of the Royal Medical, and Corresponding Member 
of the Medico-Chirurgical Societies of Edinburgh, 2Q2 
XVII. Account of part of a Journey through the Himalaya 
Mountains. By Messrs A. and P. Gerard. Com- 
municated by Colonel Gerard, - - 295 
XVI II. A comparative View of the Series of Crystallisation 
of Epidote and of Glauber-Salt. By William 
Haidinger, Esq. F. R. S. E. - - 305 
XIX. Observations on the Specific Gravity and Tempera- 
ture of Sea-Water, made during a Voyage from 
Ceylon to England, in 1819 and 1820. By John 
Davy, M. D. F. R. S., &c. &c. - - 317; 
XX. Observations on the Structure and Functions of the 
Canal of Petit, and the Marsupium Nigrum, or pe- 
culiar Vascular Tissue traversing the vitreous hu- 
mour in the Eyes of Birds, Fishes, and Reptiles. 
Communicated in a Letter to Dr Brewster, by 
Robert Knox, M. D. F. R. S. E. &c. &c. - 323 
XXL A short Account of some Observations made in France, 
to investigate the ParaUaxes of the Fixed Stars, 325 
