Snojv-Line in the Himalaya. 103 



radiating from the high plains of Cabul and Koh-i-Damun is cor- 

 rect. 



Thus Lieut. Strachey's observations, although useful in corro- 

 borating those of Webb and others, in reality leave the question pre- 

 cisely where it was, namely, that while in Kumaon the elevation of 

 the snow-line is greater on the northern aspect than on the southern ; 

 the truth, on the Hindu Cush, and, as far as observation goes, in the 

 Tartar districts north of the Bissehir range, is actually the reverse ; 

 proving, as I long since stated, and now repeat, that the facts on 

 which Humboldt relied as applicable to the whole extent of the 

 Himalaya, are found to be purely local, and dependent altogether on 

 the physical features of the country to the north and south of the 

 water-shed.* — Journal of the Asiatic Society of Bengaly New 

 Series, No. xxxiii. p. 964. 



On a Bemarkable Compound oj Iodine and Codeine. By 

 Thomas Anderson, M.D., F.R.S.E., Lecturer on Chemis- 

 try, Edinburgh. Communicated by the Author. 



In a paper on the constitution of codeine, and its products 

 of decomposition, published in the last part of the Transac- 

 tions of the Royal Society of Edinburgh, I mentioned the ex- 

 istence of a compound of iodine and codeine which I was at 

 the time prevented from describing by difficulties encountered 

 in the analysis. These difficulties which were experienced 

 in the determination of the iodine, I was at length enabled to 

 overcome by a slight modification of the process usually em- 

 ployed for determining that substance, and I am now in a 

 condition to describe the compound to which I give the name 

 of Teriodide of Codeine. 



The action of iodine on the vegetable alkalies and among 

 others on codeine, has been already examined by Pelletier,t 

 but from the account of his experiments on this base, which 

 were obviously very cursory, he does not appear to have ob- 

 tained any definite, and certainly no^crystallisable compound. 

 He mentions that iodine and codeine combine together directly, 

 forming a brown compound sparingly soluble in water, and 



* A similar explanation of the various heights of the snow-line in the Pyre- 

 nees is given by Rozet. — Edit. Edin. New Phil. Journal. 

 t Annals de Chimie et de Physique, vol. Iziii. p. 164. 



