(2

methodical or intentional & unconscious.─

Variability.

We are vy ignorant of causes —

Every sheep or dog — every bulb of Hyacinth case recognised — no doubt largely depends on being the product of 2 different paren parents & in reappearance of ancestral characters in all kinds of degree. But this will not account for appearance of new characters & of the cause of we thus very ignorant of cause.— Conditions, direct effect of case of maize & we may infer from what we see in state of nature.

Birds in n. and s. of N. States.

Generally effect. (as best known from flowers lately introduced,) is that the plant remains

constant for several generations & then breaks or becomes variable in all sorts of ways. Yet not indefinitely as pigeon does not assume colour of fowls or vice versa.

[in margin:] Different in degree in different organisms

Variation may reappear at any age, from [illeg] period, except perhaps when quite old.

(207

Ch XII

Some [Loose] green-water was dropped in some several leaves, but this without producing no any produced no effect & I then placed but when a a fragment of a leaf was inwards in a few days of a solution of blue grain of the one part of carbonate of ammonia to to an ounce of 146 of water, & the glands were all instantly blackened, & a Clouds of aggregating matter protoplasm could be seen rapidly travelling over down to cells of the tentacle, & then clouds soon formed united into spheres & variously shaped shaped masses of protoplasm, which displayed the usual Kinds [illeg] of movements; a the everything happened as in D. rotunfolia.

I then put a half-minim drop of a solution of three grains of one part of nitrate of ammonia to the [illeg] on a 146 of water on the centre of a leaf: after 6h some marginal tentacles on both sides were inflected, & after 9h those are the they met in the centre. The lateral edges margins of the leaf also became inflected incurved, so that its section for formed forming a a half-cylinder; & there was the sole movement to lamina of the leaf which I observed. but the apex of the leaf in none of my few trials was inflected.

The above [illeg] dose of the nitrite was too powerful, for in 23h in the course of 23h the leaf was Killed.)

[Insectivorous plants, pp. 280-1: "A fragment of a leaf was immersed in a few drops of a solution of one part of carbonate of ammonia to 146 of water; all the glands were instantly blackened; the process of aggregation could be seen travelling rapidly down the cells of the tentacles; and the granules of protoplasm soon united into spheres and variously shaped masses, which displayed the usual movements. Half a minim of a solution of one part of nitrate of ammonia to 146 of water was next placed on the centre of a leaf; after 6 hrs. some marginal tentacles on both sides were inflected, and after 9 hrs. they met in the centre. The lateral edges of the leaf also became incurved, so that it formed a half-cylinder; but the apex of the leaf in none of my few trials was inflected. The above dose of the nitrate (viz. 1/320 of a grain, or .202 mg.) was too powerful, for in the course of 23 hrs. the leaf died."]