CONTENTS 
OF 
No. XXV. 
Page 
Art. I. On the Construction of Oil and Coal Gas Burners, and 
the circumstances that influence the Light emitted 
by the Gases during their Combustion ; with some 
Observations on their relative Illuminating Power, 
and on the different modes of ascertaining it. By 
Robert Christison, M.D, F.R.S.E. Fellow of the 
Royal College of Physicians, and Professor of Me- 
dical Jurisprudence and Police in the University of 
Edinburgh; and Edward Turner, M.D. F.R.S.E. 
F ellow of the Royal College of Physicians, and Lec- 
turer on Chemistry, Edinburgh, - - 1 
II. A Table of the Geographical Positions of several 
Places in India. By James Franklin, Captain of 
the Bengal Cavalry, and late Assistant Quarter- 
Master General of the Bengal Army, - 39 
III. An Essay on the Composition of the Ancient Earthen 
Vases, commonly known by the name of Etruscan. 
Read before the Royal Society of 'Gottingen. By 
Professor Hausmann. Concluded from Vol. XII. 
p. 368. - 45 
IV. On two new Genera of Byssoideae, and a new Species 
of Eurotium. By Robert Kaye Greville, LL.D. 
F.R.S.E. (With a Plate), - - 63 
V. On Unusual Atmospherical Refraction. By Henry 
Home Blackadder, Esq. Surgeon, Med. Staff H. P. 
(With a Plate), - - - - 66 
VI. Account of the Deleterious Effects produced by the 
presence of the Larva of an Insect in the Human 
Stomach, with Observations. By J. Yule, M.D. 
F.R.S.E., Fellow of the Royal College of Physi- 
cians, M. W. S., &c. 
f 
72 
