AKX LYSIS OP SODALlW. §85 



per, cordage, and other materials. I did not find more diffi-, 

 culty in accomplishing the bleaching of this than in other 

 vegetables which I have occasionally tried, and 1 believe thit 

 mrticle is susceptible of a still greater degree of whiteness. 

 I remain. Sir, ' \ 



Your very obedient ^ei-vant, 

 long Acre, Feb. 24, I8O7. JOS. HUME. 



Letter from Mr. H, Davy to the Rev» James Hall. 



SIR, 



I shall giclose in this paper a small quantity of the beaa 

 fibre, rendered as white as possible by chemical means. 



It seems to bear bleaching very well, and, as to chemical 

 properties, differs very little from hemp. 



The question, whether it is likely to be of useful applica- 

 tion, is a mechanical one, and must be solved by experiments 

 •n itf comparative strength. 



I am. Sir, 



Your obedient humble servant, 



H. DAVY, 



vir. 



A Chemical Analysis of Sodallte, a new Mineral from Green* 

 land. By Thomas Thomson, M. D. F. R. S. £., Fellow 

 of the Imperial Chirurgo-Medical Academy of Peters* ^ 



burgh ♦. 



Jl. HE mineral, to which I have given the name of sodalite, Sodalite,anew 



was also put into my hands by Mr. Allan f. In the Green- '"*"^'^'» !« ^^^ 

 r J J I v>. *.v.i. compositioQ of 



land collection which he purchased, there were several spe- a primitivtr 

 cimens of a rock, obviously primitive. In the composition '^°*'^' 

 of these the substance of which 1 am about to, treat formed a 



* From the Transactions of the Royal Society of Edinburgh, 

 t See p. 47. 



constituent, 



