460 Researches respecting the Action of 



11. With acetate of cerium, a white precipitate easy of 

 solution. 



12. With po/Z/7(/;«7M dissolved in nitro-murialic acid, a 

 white precipitate, which on diluting the solution dissolved 

 gradually. 



13. With nitro-muriate o( antimnny, it yields a white 

 precipitate, which, by degrees dissolves, it" the menstruum 

 has been much diluted. 



14. Muriate of titanium gives a blue-gray precipitate, 

 which dissolves if the quantity of the precipitant be not 

 too great. 



13. With nitrate of Z'?57n?</f/j, a white precipitate, which 

 is partially dissolved when the solution of this metal is not 

 neutralized. 



16. Muriate o^ tin yields a white precipitate, which dis- 

 solves slowly, and only when a small quantity of the pre- 

 cipitant is added. 



17. Muriate of copper, pure and free from iron, gives a 

 white precipitate which dissolves tardily when a little of 

 the precipitant is added. A greater portion thereof leaves 

 the greater part undissolved, and pale green. 



18. Muriate of tellurium: a white precipitate almost 

 insoluble. 



19. Nitrate oi quicksilver : a white insoluble precipitate; 

 crystalline, consisting of small points or needles. 



20. Muriate of iron : an orange, insoluble precipitate, 



III. Benzoate of Iron. 



a. One gramme of pure brown- red oxide of iron, previously- 

 heated to redness, was dissolved in muriatic acid with the 

 assistance of a gentle heat. The solution was diluted with 

 water, and whs neutralized as accurately as possible with 

 caustic ammonia; and benzoate of ammonia was added as 

 long as any deposit could be produced. The precipitate, 

 which was bulky, was, while wet, of a pale reddish yellow 

 colour. It was gathered on a clean, well dried, and iiicelv 

 weighed filter. The precipitate was carefully edulcorated 

 with water, and dried by standing for several days on a 

 heated stove, until it had ceased to diminish in weight. 

 The colour ren)aincd the same as in its wet state, only 

 somewhat paler. After having assumed the temperature 

 of the apartment (+17° of the centigrade thermometer), it 

 weighed 4*00 grammes. Thus 100 parts of air-dried ben- 

 zoate of iron contain 25 parts of red oxide of iro7i, and 75 

 parts of benzoic acid and water. 



L The 



