36 



ACTION OF HALOGEN COMPOUNDS OF ETHYL AND AMYL 



soluble in boiling water, but when cold, this liquid dissolves but little of the salt. 

 The following is the analysis : — 



5-173 grains, dried at 212°, gave 

 10-840 ... carbonic acid, and 

 ; 2-755 ... water. 



5-885 ... dried at 212°, gave, on ignition, 

 0*938 ... sesquioxide of chromium. 





f 4-480 ... 

 u -{ 0-715 ... 



dried at 212° 



, when 



ignited, gave 





sesquioxide of chromium. 







Experiment. 





Calculation. 



Carbon, . . 



I. 



. . 57-15 



ii. 



57-33 



C 4fi 276 



Hydrogen, 



. . 5-91 







5-81 



H 28 28 



Nitrogen, . 









5-81 



N 2 28 



Oxygen, . 









29-99 



6 48 



Chromic acid, 



. . . 20-86 



20-88 





21-06 



2(Cr0 3 ) 101-4 



100-00 



100-00 



100-00 



481-4 



which gives results according satisfactorily with a formula which contains an 

 atom of water more than those of the corresponding potass and ammonia salts, 

 and may be thus written : — 



C 4e H 26 N 2 4 HO, Cr0 3 , HO Cr0 3 = C 46 H 27 N 2 4 Cr0 4 , H Cr0 4 . 



The failure of the analogy here, with the peculiar combinations of potass and 

 ammonia, is worthy of attention ; of course, it readily admits of explanation, if 

 the one atom of water be assumed as retained from the water of crystallization 

 of the new salt. The loss sustained by exposing the crystals to heat was as 

 follows : — 



J" 4-660 grains, lost at 212°, 

 L 1 0-160 ... water 



r ii- 



n -( o- 



510 

 435 



lost at 212°, 

 water 



ii. 



Percentage of water, 3*43 3 -77 



and 3-60 is the calculated percentage corresponding to a loss of two atoms of 

 water by a salt of the formula, — 



C 46 H 27 N 2 4 Cr0 4 , H Cr0 4 + 2 aq. 



Platinum Salt of Ethylostrychnine. — By the successive addition of nitrate of 

 silver and hydrochloric acid to a warm solution of the iodide, and that of bi- 

 chloride of platinum to the clear fluid, this salt fell as a curdy yellow precipitate, 

 which became crystalline after some hours ; from more dilute liquids it crystallizes 

 at once in a very beautiful form, namely, in groups of stars, of which the individual 



