400 Foreign Literature and Science. 



yellowish. When this compound was submitted to the ac- 

 tion of the pile, the yellowish solution assumed a fine blue 

 color at the negative pole, indicating the presence of iodine 5 

 and an orange color at the positive pole, to which the brome 

 appeared to be transported. The smallest quantity of brome 

 or of iodine, found in a state of combination may, it appears, 

 be thus manifested. If then brome is a compound which 

 contains iodine, by putting a solution of brome and starch in 

 the voltaic circuit, the iodine will be seen giving a blue color 

 at one of the poles. But though the experiment has been 

 carefully made, no such change has been apparent, and 

 hence, there is good reason to infer, that brome is an element, 

 of the same genus as chlorine and iodine. 



Brome, when combined with iodine, goes to the positive 

 pole, and consequently is more negative, which agrees with 

 the observations of Balard, who found that brome had more 

 affinity for bases than iodine. But when water, which holds 

 brome in solution, is decomposed, hydrogen is obtained at 

 the negative pole, as when a solution of iodine is decomposed. 

 If the water be impregnated with chlorine, no gas is obtained 

 at that pole, because chlorine having a greater affinity for the 

 bases than iodine or brome, combines immediately with the 

 hydrogen and forms hydrochloric acid which remains dis- 

 solved. 



" These few experiments appear to me sufficient to con- 

 firm the opinion of M. Balard relative to the nature of brome, 

 and the place it should occupy between chlorine and iodine." 

 — Ann. de Chim. et de Phys. June 1827. 



10. Adulteration of Sulphate of Quinine by Sugar, by M. 

 Winkler. — The author having received some sulphate of 

 quinine mixed with sugar, invites the attention of physicians 

 and pharmacopolists to this new species of fraud, and propos- 

 es the following method of detecting it. Dissolve the salt in 

 water, and precipitate the quinine by carbonate of potash. 



Filter the liquid and evaporate to dryness ; the residue 

 being treated with alcohol, the latter dissolves the sugar and 

 leaves the sulphate of potash and the excess of carbonate un* 

 touched : on evaporating the alcohol the sugar is obtained 

 quite pure. — Bull. Univ. Fer. 1 827. 



