506 SEC. 13. -CHEMISTRY. 



magnesia, and subsequent evaporation of the solution on a water 

 bath. 



Formula Mg S 2 O 3 , 6 H 2 O. 



Dr. E. A. Letts and Mr. W. J. Nicol. 



2506. Hyposulphite of Strontium, obtained by mixing hot 

 concentrated solutions of hyposulphite of soda and chloride of 

 strontium. The salt separates spontaneously from the solution. 



Formula Sr S 2 O 3 , 5 H 2 O. 



Dr. E. A. Letts and Mr. W. J. Nicol. 



2507. Hyposulphite of Barium, obtained by mixing solu- 

 tions of hyposulphite of soda and chloride of barium. 



Formula Ba S 2 O 3 , H 2 O. 



Dr. E. A. Letts and Mr. W. J. Nicol. 



2508. Hyposulphite of Nickel, obtained from hyposulphite 

 of strontium by double decomposition with sulphate of nickel, and 

 subsequent evaporation of the solution in vacuo. The salt readily 

 decomposes. 



Formula Ni S 2 O 8 , 6 H 2 O. 



Dr. E. A. Letts and Mr. W. J. Nicol. 



2509. Hyposulphite of Cobalt, obtained from hyposulphite 

 of strontium by double decomposition with sulphate of cobalt, and 

 subsequent evaporation of the solution in vacuo. The salt readily 

 decomposes. 



Formula Co S 2 3 , 6H 2 O. 



Dr. E. A. Letts and Mr. W. J. Nicol. 



2510. Liquid Hydrochlorate of Turpentine, distilled over 

 with water vapour, and dried with chloride of calcium. 



Formula C 10 H 16 HC1. 



Dr. E. A. Letts. 



2511. Solid Hydrochlorate of Turpentine, crystallized 

 from alcohol, 



Formula C 10 H 16 HC1. 



Dr. E. A. Letts. 



2512. Hydrate of Turpentine (Terpene), crystallized from 

 water. Dr. E. A. Letts and Mr. James Davidson. 



2513. Hydrate of Hydrocarbon contained in Oil of 

 Lavender (exotic) ; obtained by allowing a mixture of the 

 oil with dilute alcohol and nitric acid to remain for some weeks 

 at rest. The specimen was crystallized from water. Not yet 

 analysed. Dr. E. A. Letts and Mr. James Davidson. 



2514. Hydrochlorate of the Hydrocarbon contained 

 in Oil of Lavender (exotic) ; obtained by saturating oil of 



