164

A

Aug 27th 1874    7. 41' A m. ( Certainly secretion is removed from a gland with singular facility—)

   albumen.    Black Thread.

very small

9. glands dry

10. 25' do darkened . (25 [+] 19 [=] 2. 44')

10 25'—30'. pushed 2 bit on to surface of leaf — between 2 bits of black Thread. (3. not dissolved) (5. 30' one in 7. bit of albumen much dissolved & so much secretion that I think little glands must secrete

28th    7. 45' a m    Both bits entirely liquefied, but still white streak in fluid — no secretion has run down stem . The 1 gland with little atom which yesterday was quit dry has now begun to secrete again but the bit of albumen not all dissolved (2. 15 Both bits now extremely dissolved )(I can see movement travel up the stem on one gland.) 29th 7. 45' this last atom is still characteristic visible. No I see I have mistaken the bit left on one of tall glands not digested or liquefied!!)

29th 7. 45' All the liquefied albumen absorbed

7. 48'   Fibrin    whit Thread 12 [+] 2 15 [=] 27

[sketch]

—white Thread

(( I now think tall glands secret only acid ?? ) Digestion certainly goes on chiefly on leaf.))

—Thread

subsided

9. glands dry & I think discoloured ie. not so pink

10. 10' glands dry discoloured & dusky. The subsided bit of fibrin seem quit dissolved !! 5. 39 I have no doubt dissolved 10. 15' pushed to 2 other bits of (aft 2. 20' fibrin on the surface of leaf (3. not dissolved)

28' 7. 45; fibrin all quite liquefied (mem. it had grown quit dry & hard on the summit of the glands) in one part alone the secretion which hung in one place in large drop was not quit transparent, showing some not quit dissolved. (2. 15' all fibrin entirely liquefied & much clear secretion on branch

The secretion though viscid is most easily removed, so that very difficult to leave any object adhering to glands.— Litmus paper coloured as by mineral acid. Leaves linear — many inches in length

165

B
Aug. 25th 1874. Drosophyllum. —

Secretion intensely acid, far more than in Drosera or Dionæa — It is so on glands not excited — & I find it so on young leaf, with not much secretion & the whole of which leaf had never caught an fly insect).

In this rather young plant — no glands along middle of upper surface of leaf & in some leaves none on a medial line on lower surface —

The lower glands secrete more copiously than upper & flies generally caught towards lower side.

On one leaf on plant in cool-hothouse 8 small insects, chiefly Diptera, 10, on another & 14 on another — & 16 on another

25' 8° 15 put bit of albumen on glands on lower side of almost upright leaf

[165v]

28th 7° 55' bit of free fibrin (close to where point of dead branch sticks) dragged over a few glands & left on side of branch —

10° 25' sodden with secretion — (2° 15' partly dried up; though plant kept under humid Bell-glass.— Must be absorption.—

29th 7° 40' the fibrin now completely liquefied, but the liquid not quite clear, some atoms still suspended in fluid — fluid very acid, as one other drop, in another place; but most of drops absorbed. N. B Probably not only acid, but pepsin already secreted, judging from quickness of action & absorption — It is clear that there is double action — the ready fluid acts & is absorbed & then there is resecretion

166

(C

 

Aug 30th /74/    Drosophyllum    13 [+] 25 [=] 38

7. 47'    albumen very minute squares

10. 25' all 4 dry & I  to think to  all pink disappeared    & I think it impossible that the atoms of albumen cd have absorbed so much secretion

( 5. 15'    same state )

[sketch]

} albumen

subsided

subsided

albumen

— Black without Thread

31st 7. 30' Am The bits of albumen still quite dry on glands — Cd I have made mistake before ?

(One of subsided pieces quite liquefied, but with some white streaks in fluid    The other moderately acted on, yet half-solid (11. 45' do)

(Sept 1st 8. all same state to ) to  : the half solid bit of albumen now dry & adhering to leaf; but the weather has been cold in my study.) (Sept 2d all do.)

Sept. 3d. still dry & glass-glands, but then plant flagged yesterday from Heat. other glands still secreting.

7. 50'    4 Blue glass on glands.

10.. 25' glands not in the least dry & pink with atoms of blue glass.

(5. 15' same state ) ( 31' 7. 30' A.m. still just as much secretion as before

(Sept 1'.    8.    do.    It is clear some trifle must be absorbed by taller glands, though thy have very little power of absorption.)

It is extraordinary difficult to put anything on gland, as the object . bit of albumen touched by wet needle withdraws secretion in a drop.

167

D
Sept 16 7° 50' A.m. Branch with white Thread.

(The glands dried so immediately that must be absorption by substance.)

Cart. — Cart — Albumen Cart [sketch]

Sept 17th. 7°. 30' glands dry — The cartilage had been soaked & I think cd hardly have absorbed a whole drop— The albumen had just been boiled & was quite damp.

cut off gland & see if discoloured