21S Royal Society : — 



It is worthy of notice, that in chemical decompositions very often 

 three equivalents of an aldehyde unite and act like one molecule. I 

 will only mention, as examples, mesitylene, acetonia, thialdine, hy- 

 drosalicylamide, and amarine, 



GlyoxaUne =C3HjN2 is obtained as binoxalate from the mother- 

 liquor of glycosine, if, after expelling the ammonia by gentle heating, 

 an excess of oxahc acid is added. The binoxalate crystallizes very 

 well and may be purified easily. The composition of it is expressed 

 by the formula C3 H, N, + C, H, O,. The base is obtained from this 

 salt by treating it with carbonate of lime, and evaporating the filtrate 

 from the oxalate of lime to the consistency of a strong syrup. 



Glyoxaline crystallizes with difficulty in prismatic crystals, radia- 

 ting from one centre. It is easily soluble in water, has a strong 

 alkaline reaction, neutralizes acids perfectly, but does not appear to 

 form a compound with carbonic acid. It melts easily, smells like 

 fish, and evaporates at a higher temperature in dense white fumes. 

 Chloride of copper forms a precipitate with glyoxaline, which is 

 soluble in an excess of the base. 



The chloroplatinate, C3 H^ N^ + HCl PtCl^, crystallizes in large red 

 prisms, and is easily soluble in hot water. 



The formation of glyoxaline takes place according to the following 

 equation : — 



2(C,H,0,) + 2NH3=C3H,N, + CH,0, +2H3O 



Glyoxal. Glyoxaline. Formic acid. Water. 



Glyoxaline is homologous with sinnamine. 



•' Further Remarks on the Organo-metalHc Radicals, and Obser- 

 vations more particularly directed to the isolation of Mercuric, 

 Plumbic, and Stannic Ethyle." By George Bowdler Bucktou, Esq., 

 F.R.S. 



Before again entering on the subject of the organo-metals, the 

 author wishes to call attention to the remarks he has previously 

 made* on the difficulties which presented themselves at that time in 

 the preparation of mercuric ethyle. Secondary decompositions, 

 induced by the nature of the materials employed and the high 

 temperature necessary to the reaction, showed themselves even in 

 the more easily prepared mercuric methyle, and reduced the quantity 

 obtained considerably below that pointed out by theory. 



The loss sustained in the similar operation of distilling together 

 cyanide of potassium and iodide of mercurous ethyle, C^ Hj Hg, I, is 

 yet more marked; and it may be remembered that the portion 

 obtained did no more than suffice for a cursory examination of its 

 most marked characters. A new mode of operating was therefore 

 desirable, and it was not long before the following considerations 

 presented themselves. 



The powerful and well-defined affinities of zinc-ethyle have already 

 furnished a valuable key to the explanation of several chemical 



* Phil. Trans. Roy. Soc. ; Proc. Roy. Soc. vol. ix. p. 91. 



