62 



The apparatus 

 fimp'y ir^d 

 highly conve- 

 nient. 



SCIENTIFIC NEivS, 



fated ; and the liquid will flow into B, where 'rt will abforfe 

 the oxigen, and form a partial vacuum. If this circumftance 

 be found, or apprehended, to prevent the complete or rapid ab- 

 forption, the vefiel A may he plunged beneath the furface of 

 common water, and the ftopper D fiowly opened. The pref- 

 fure of the atmofphere w^ill then force in a quantity of water^ 

 which will dilute the hydrofulphuret, but not fufficiently to 

 prevent the completion of the procefs. The vefiel B mufl be 

 graduated to (how the dimenfions of the refidue, or otherwife 

 this refidual gas may be transferred into a veffel exprefsly gra- 

 duated for meafuring gafes. 



By this fim.ple and elegant apparatus we fee that the liquid 

 is economized, and the facility, neatnefs, and precifion of ex- 

 periment infured. The fize here mentioned is very well 

 adapted to the purpofes of public demonftration ; but it is 

 almoft needlefs to remark, that it may be made confidcrably 

 fmaller without depriving it of its utility and excellence. 



P. S. While reading this proof, I have received a line from 

 Dr. Hope, by which I am very forry to find that the flvctch I 

 have given is not accurate ; but as it is now late in the month, 

 and the figure is engraved, I fliall be careful to give another 

 engravingwiththeobfervations he may favour me with. W. M* 



SCIENTIFIC NEWS. 



Comhujiion of Metals in non-refpirable Gaft->, by means of GaU 

 vanifm.* 



Metals burned 1 ROFESSOR TromfdorfT has noticed that metals are com- 

 by galvanifm. ' buRible by means of the galvanic fpark in hidrogen, ammo- 

 nia, nilro,'j;en, nitrous and carbonic acid gafes. 



Redwdion of 

 titanium. 



BcduBlon i]f' the Oxide (f Titanium. 



Profeflbr Lampadius has fuccaeded in reducing to the me- 

 tallic fiate by means of charcoal only, the oxide of titanium,, 

 obtained by decompofing the gallate of titanium by potafh or 

 foda. The metallic titanium is of a dark copper colour; it 



* TrcmfdorfTs Hiftoiy of Galvanifm and its chemical agency, 

 p. 12i. 



has 



