II K \IISTR Y OF TIIK LEUCOMAINES. 331 



Moeenles, which, under tlic microscope, appear :is long, 

 sli:u-|), pliimos.- iiccdics distinction from diethylencdiamine. 

 The aqueous solution of the base is precipitate! by phos- 

 phomolybdic mid phosphotungstic acids, tannic acid, uold 

 :in<l platinum chlorides. It cannot !>< volatili/cd from 

 alkaline -olution by steam without undergoing decomposi- 

 tion (MA.IERT and SCHMIDT). It is not poisonous. 



The hydroehloride, (/ 2 H,X.1I( 1 1 (?), crystalli/cs in six- 

 sided prisms, united in tufts, and is extremely soluble in 

 water, alnio-t in-oluhlc in absolute alcohol and ether. 



The aurorhloride, ( 'JI..N.II( 1 l.AuCl s (?), forms shining, 

 LLolden-yellow, irreiiiilar plates, and when freshly procipi- 

 tated it is easily soluble in water, alcohol, and ether, but 

 the dried salt is incompletely soluble in water. The aque- 

 ous solution, treated with magnesium, gives oft" a sperm- 

 like odor. The platiuochloride crystalli/es in prisms. 



The phosphate, (O 2 H 5 N) 2 .H 3 PO 4 -f 3H 2 O(?), forms prisms 

 and slender double pyramids arranged in rosettes. It is 

 ditlieultly soluble in hot water, insoluble in alcohol, easily 

 soluble in dilute acids, alkalies, and alkali carbonates. It 

 melts with decomposition at about 170. It is probable 

 that the above formula does not represent the salt as found, 

 and from theoretical considerations LADENBURO was in- 

 clined to think that SCHREINER'S phosphate had the com- 

 position (C 2 H 5 NH) 4 Ca(PO 4 ) 2 . 



LADKXHI-RC and A MEL prepared in 1888 a compound, 

 cthyleneimine, which was first supposed to be isomeric with 

 spermine. The reaction whereby it is prepared is similar 

 to the one by which LADENBURG effected the synthesis of 

 piperidine. Kthylenediamine hydrochloride is subjc-cted to 

 dry distillation, when it decomposes into ammonium 

 chloride and the hydroehloride of the new base. The re- 

 action was supposed to be represented by the equation : 



CH 2 NH 2 .HC1 CH 2N 



>XH.HC1+NH 4 C1. 

 CHjNHj.IICl CH, 



Sin<v then LADKMMIK; has shown that the boiling-point 

 of this compound did not auree with what it should be 



