88 CUCURBITACE. 
reagents. The special properties of this alkaloid will be con= 4 
sidered later. The principle insoluble in acids had the q 
properties of a resin, a 
The alkaline aqueous solution was subsequently agitated with — 
chloroform, and then with amylic alcohol. In both cases ex- 
tracts were yielded partly soluble in dilute acids, the solutions : 
affording precipitates with alkaloidal reagents. From colour — 
reactions and the physical properties of these alkaloids, they 
appeared to be similar to the one first extracted by ether. The 
three acid solutions were consequently mixed, agitated with — 
amylic alcohol, which removed a trace of resin; the acid then a 
neutralized with carbonate of soda, and the solution agitated 
with fresh amylic alcohol. On evaporating off the amylic 
alcohol, a varnish-like residue was left, easily soluble in alcohol 
and amylic alcohol, but less readily dissolved by ether chloro- 
form. In water the extract was only very slightly soluble; 
dilute sulphuric acid it was not wholly soluble, a trace of resin 
being left. The acid solution was strongly bitter. Wi 
alkaline carbonates it gave a white precipitate ; with platin 
and auric chlorides amorphous precipitates: it also yield 
precipitates with phosphomolybdic acid, potassio-mercu 
_ Ether chloroform and amylic alcohol also extracted a gol 
brown resin, insoluble in alkaline carbonates, easily soluble im 
caustic soda, and less readily dissolved by ammonia. In amyli¢ 
alcohol the resin was: more easily soluble than in ether 
