<$Qg COMPONENT PARTS OF SALTS. 



three salts submitted to experiment. But when the differ- 

 ence amounts to eight hundredths, as between the small and 

 large grained salt, it may safely be imputed to an inferior 

 specific gravity in that species, which occupies so much 

 greater a proportional bulk*. 

 British salt at The last series of experiments proves decisively* that in 

 least equal to an important quality (viz. that of specific gravity), which 

 is probably connected with the mechanical property of hard- 

 ness and compactness of crystals, little or no difference is 

 discoverable between the large grained salt of British, and 

 that of foreign manufacture. If no superiority, then, be 

 claimed for British salt as applicable to economical pur- 

 poses, on account of the greater degree of chemical purity 

 which unquestionably belongs to it, it may safely, I believe, 

 be asserted, that the larger grained varieties are, as to their 

 mechanical properties, fully equal to the foreign bay salt; 

 \- And the period, it may be hoped, is not far distant, when a 



prejudice (for such, from the result of this investigation, it 

 appears to be) will be done away, which has long proved 

 injurious to the interests and prosperity of an important 

 branch of British manufacture. 



(To be concluded in our next. J 



IX. 



On the Proportions of the Elements of some Combinations, 

 particularly of the Alkaline (Jarbonates and Subcarbonates : 

 by Mr. J. E. Berard-}-. 



Component JL HE accurate determination of the component parts 



parts of talts f sgL \ me substances is of the more importance, because it 

 should be ao» r 



* Mr. Hassenfiatz seems to have suspected, that a difference in the 

 specific gravity of the same salt may be occasioned by a variation in 

 its mode of crystallization. De la Pesanleur spdcijique det Sds } Anu. 

 de Chim. XXVIII, p. 17. 



t Abstracted from Ann. de Chimie, vol. LXXI, p, 41. 



i» 



