302 RESULTS. [aPP, I 



Chapter XVI. p. 285. Unorganised ferments etc. 



Diastatic Ferments. 



Experiment No. 2. 



Using the second method described in the text (p. 288) an 

 extract of 10 grs. .of fresh malt acting for one hour at 50° on 

 soluble starch produced 2 "5 grs. of maltose ; whilst a similar 

 extract of 10 grs. of barley grains acting under exactly the 

 same conditions produced only traces of maltose. 



Experiment No. 3. 



An extract of air-dried leaves of barley compared under 

 exactly similar conditions with the same malt extract as used 

 in experiment No. 2 produced no maltose. 



Experiment No. 4. 



Adding to the soluble starch solution the finely divided 

 tissues themselves and not extracts which had been filtered 

 clear. 



10 grs. air-dried leaf acting Leaves of Leaves of 



for one hour at 50°, pro- Pisum THfolium 



duced from soluble sativum. pratense. 

 starch. 



Maltose 0-6 grs. 0-2 grs. 



Invertase. Glycase. Glucoside ferments. 

 Experiments No. 1 — 3. 



Positive results should be easily obtained in all these 

 experiments. 



In No. 3 — where a control experiment is made — we have 

 never found the quantity of sugars produced by digesting 

 10 grs. of coarsely ground maize with 200 c.c. of water, for 5 

 or 6 hours at 40° — 50°, to exceed 0-2 grs. of 'reducing' 

 sugars. 



