Try Fibrin (as standard test)

— cartilage (for effect)

— fibro-cartilage, as will not fully digest, but rendered hyaline by Drosera.

Inset in secretion and water for some time

Pour out of virgin pitcher some secretion in water glass and with it digest a 1/20^th of inch cube of albumen. If not, then try the same with some secretion from a pitcher which is in the act of Digestion. Seems to me very important, whether the ferment is secreted only from a stimulus. I understand secretion of virgin pitcher is acid. We could try citric acid wth pepsin if we knew proportion of citric acid in the secretion.

Will you put 6 cabbage-seeds and 3 Peas in secretion and in water for 4 days, and then lay on damp sand under cover in your room and see if they equally germinate. If the Nepenthes seeds do germinate see whether edge of cotyledons &c. are browned and injured.