Intelligence and Miscellaneous Articles. 415 



(4) The salts are precipitated by the sulphydrate of ammonia, 

 excess of which does not seem to redissolve perceptibly the sul- 

 phide formed. 



(5) The salts are precipitated by sulphydric acid in presence of 

 acetate of ammonia and much free acetic acid. In the presence of 

 zinc the new body is concentrated in the first-deposited sulphides ; 

 it nevertheless required six successive precipitations to effect the 

 almost complete disappearance of the sulphide of zinc. 



(6) Sulphydric acid in solution slightly acidulated by chlorhydric 

 acid does not precipitate the salts. 



(7) The oxide redissolves in excess of carbonate of ammonia, 

 together with the zinc. 



(8) The extremely small quantity of substance at my disposal 

 has not permitted the isolation of the new body from the ac- 

 companying excess of zinc. The few drops of chloride of zinc 

 in which I have concentrated the new substance give, under the 

 action of the electric spark*, a spectrum composed principally 

 of a violet line, narrow, readily visible, situated nearly at 417 

 on the scale of wave-lengths. I also perceived a very faint line 

 cowards 404. 



I am pursuing this investigation, and hope in a few days to 

 procure a little more of the old material, in order to determine 

 the reactions of the new substance. 



[The following addition to the above was presented at the 

 sitting of the Academy, Sept. 29.] 



The experiments which I have made since August 29 confirm 

 me in the notion that the substance noticed must be considered 

 a new element, to which I propose to give the name of Gallium. 



(9) The sulphide is really insoluble in excess of sulphydrate of 

 ammonia. 



(10) Although the quantity at my disposal is still very small, 

 I have obtained the chloride in such a state of concentration 

 that the line 417 is sufficiently bright under the action of the 

 induction-spark. 



(11) The chloride gives the line 417 in the gas-flame, but more 

 feeble than with the electric spark exploding upon the solution. 



(12) The salts are readily precipitated, without heating, by 

 carbonate of barium. 



(13) In a mixture containing a large excess of chloride of zinc 

 the new substance is thrown down by sulph} r drate of ammonia, 

 with the first portions of the sulphide of zinc. 



(14) Repeated evaporations with much excess of aqua regia do 

 not appear to occasion any loss of chloride by volatilization. 



(15) It seems to me that the sulphide will be white, like that of 

 zinc. This point has to be cleared up after complete purification 

 of the substance. 



(16) When hydrated chloride of zinc containing traces of the 

 new body is heated up to the point at which a small quantity of 



* Employing the small tubes described in my work Spectres LumineuXy 

 p. 15. 



