226 Miscellaneous Intelligence. 



thrown quickly under a jar filled with water, and inverted in 

 a glass basin, also containing water, several decilitres, (,6.1 

 c. i. each.) of arseniuretted hydrogen will be obtained in two or 

 three minutes. 



In this process there is no want of bottle, tube, acid or fire, 

 and the facility it affords of operating at common or low tem- 

 peratures, is probably very favourable to the complete satu- 

 ration of the hydrogen by the arsenic. — Journ. de Phys., 

 xciii. 135. 



4. Oxide of Titanium. — Mr. Rose of Stockholm, has at- 

 tempted to analyze oxide of titanium, by converting it into a 

 sulphuret. The method adopted was to heat the oxide highly 

 in a porcelain tube, and pass sulphuret of carbon in vapour 

 over it. The sulphuret thus obtained was a greyish-yellow mass, 

 bordering on green, which, by the slightest touch took a me- 

 tallic lustre, resembling the magnetic sulphuret of iron. The 

 oxide of titanium is considered as containing 33.93 hundredths 

 of its v.-eight of oxygen. It does not possess any of the cha- 

 racters L>f a salifiable laase. The nitrate and muriate, as usually 

 described, are salts, with bases of potash or soda. The oxide 

 combines with water, reddens blues, and drives off carbonic 

 acid from carbonates. — Edinburgh Philosophical Journal, vi. 

 p. 15. 



5. Cadmium in Metallic Zinc. — Dr. Clarke has discovered the 

 presence of cadmium in the metallic zinc of commerce. Its 

 quantity is very small. 



6. Solution of oxide of Copper in Ammonia. — M. Berzelius, 

 in his description of a method of analyzing the ores of nickel, 

 says, that he had not been able to determine whether oxide of 

 copper is soluble in ammonia or not. '' It is certain that all 

 those solutions, which are generally regarded as oxide of copper 

 in ammonia, are double salts, with excess of base. 1 digested 

 oxide of copper in concentrated ammonia for eight days in a 

 stopped bottle. The solution became of a light-blue colour in 

 48 hours, and it did not afterwards increase. A drop of car- 

 bonate of ammonia let fall into the liquor, immediately dis- 

 solved a part of the oxide, and made the lower stratum of the 

 liquid of a deep blue colour." 



When an ammoniacal solution of oxide of copper is mixed 

 with caustic potash, the oxide of copper is precipitated in a 

 few seconds ; and if the quantity of potash is sufficient, it is 

 entirely deposited in the form of a blue hydrate, which it is 

 very easy to wash. When well washed it yielded blue hydrate 

 of copper, combined with two atoms of water ; it does not 

 retain any trace of potash. — Annates de Chimic, XVII. 



