vill CONTENTS. 
XXV. Experiments on the Ordinary Refraction of Iceland Spar. By Wit- 
LIAM Swan, Esq. Communicated by Professor KELLAND, 375 
XXVI. Observations on the Temperature of the Ground at Trevandrum, in 
India, from May 1842 to December 1845. By Joun CatpEcort, 
Esq., Astronomer to the Rajah of Travancore. Communicated in 
a Letter to Professor J. D. Fores, : , ‘ ; ; 379 
XXVITI. On the Parallel Roads of Lochaber, with Remarks on the Change of 
Relative Levels of Sea and Land in Scotland, and on the Detrital 
Deposits in that Country. (Witha Plate.) By Davip MILNE, Esq., 395 

PART TV: 
XXVIII. Memow of Dr THomas Cuarves Hore, late Professor of Chemistry 
in the University of Edinburgh. By THomAs Stewart TRAILL, 
M.D = : : ; : 419 
XXIX. On the Colouring Matter of the Morinda citr sick By THOMAS 
ANDERSON, M.D., 2 ; : . ; 435 
XXX. Notice of the Orbit of the Binary Star a Centauri, as recently deter- 
mined by Captain W.S. Jacos, Bombay Engineers. By Professor 
C. Prazzi SMYTH, s : ; ; ‘ ‘ ‘ 3 445 
XXXI. An Attempt to Improve the present Methods of Determining the 
Strength and Direction of the Wind at Sea. (With a Plate.) By 
Professor C. P1azzi SMYTH, . : : ; ; 5 455 
XXXII. On the Products of the Destructive Distillation of Animal Substances. 
Part I. By Tuomas AnpveErson, M.D., : : 463 
XXXIII. On the Action of the Dry Gases on Organic Colouring Matter, and its 
relation to the Theory of Bleaching. By Grorce Wiison, M.D., 475 
