; 



BARIUM, STRONTIUM, AND CALCIUM. 



30 



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A rod of platina reaches from some mercury in the capsule D, through the 

 necks of the beds A and B, into a stratum of mercury, resting upon shoulder 

 of the bell glass B, so as to be about a quarter of an inch beneath the flask. 

 Several circumvolutions of platina wire. No. 14, forming a flat coil, were 

 interposed between the mercury and the bottom of the flask. The recurved 

 ends of this wire were made to reach into the mercury in the capsule L. Over 

 the mouth of the bell F, after the introduction of the flask and coil, some bed- 

 ticking was tied, so as to prevent contact between the platina and mercury, and 

 to check, as much as possible, any reunion between the radical taken up by 

 the one and the chlorine liberated by the other. Into the bell T, a saturated 

 solution of the chloride to be decomposed was poured, and some coarsely pow- 

 dered crystals of the same compound added. Of course the solution, by peniBr- 

 trating the ticking, came into contact with the mercury. 



