ANALYSIS OF BRITISH A.ND FOREIGN SALT. g^j 



II. 



On the Botryolite, or Grapestone: by Count Dunin 



BORKOWSKI*. 



JL HIS stone is only found in mass, and its external figure Botryolite. 

 is uniform. From this figure its name is derived. 



Its colours arc pale rose, pearl gray, yellowish white, Its characters^ 

 ashen gray, and Isabella yellow. All these colours alter- 

 nate in very thin laminae ; the deepest colour in general 

 forming the outermost coat. 



Both externally and internally it is without lustre. 



Its fracture is with slender, divergent tibresi It becomes 

 scaly. 



Sometimes it is translucid throughout, sometimes only at 

 the edges. 



It is semihard, scratching glass only in a slight degree J 

 and brittle. 



Its specific gravity is 3*000. 



Before the blowpipe it is fusible with ebullitiori. 



It contains boracic acid; Contains bori- 



It is found accompanied with quartz, black schorl, car- £ aC ' d ' _,„ 

 • . , .' , . .. .. . . . iU Where fouri<k 



bonate of lime, martial pyrites, and magnetic iron, irt the 



mine of Kienlie, near Arendahl, in Norway. 



HI. 



An Analysis of several varieties of British and Foreign 

 Salt (Muriate of SodaJ, with a view to explain their Fit- 

 ness for different economical purposes. By William 

 Henry, M.I). F. R. S. l r .P, of the Lit. and Phil. So- 

 ciety, and Physician to the Infirmary at Manchester* 



(Concluded from p. 20G.J 



Sect. III. Account of the Methods of Analyzing the sehe~ 

 ral Varieties of Muriate of Soda* 



JL HE method of analysis, which I adopted, in examining 

 the several varieties of muriate of sod? was as follows. 



* Journal de Physique, vol. LXiX, p. I59. 



Vol. XXVI.— Aug. 1810. T Wfcen 



