12

1)

Old Plant

Upper pair of leaves

[diagram] b.........c

a

a = leaf angle

bc = leaf distance

leaf angle at 5.35 & 6

Time

3.

  ⨀  ⨀  

⨀    ⨀     3.PM

 ⨀      ⨀   5.10 

 ⨀    ⨀   5.35 

 ⨀     ⨀   6  

 ⨀     ⨀   8.30  

⎼⎼⎼⎼  ditto ⎼⎼⎼⎼⎼  10.25 

At 6 o'clock therefore the leaf distance has diminished almost as much as it ever does. Whereas the leaves are very far from perpendicular at that time and had not moved & during the interval of time from 5.10 to 6— the leaf angle has not diminished— At 8.30 the leaves have become perpr and a slight further diminution of leaf distance had taken place— At 10. 25 no change perceptible—

12v

Desmodium

13

2

Old Plant

Second pair of leaves

[diagram labels]

a

 ⨀    ⨀  

  ⨀    ⨀   about 2.30 - 3

  ⨀    ⨀      about 5.10 - 5.30

  ⨀   ⨀       5.38

  ⨀   ⨀   8.30  

    ⨀     10.25    ditto 

(a) is leaf angle from about 5.10 – 5.38.

at 8.30 leaves were perpr

Here also the leaf distance began to diminish before the leaves were perpr

14

3

Tall Young Plant

Second Pair of Leaves

[diagram]

  length of petiole 

 ⨀  ⨀   

  ⨀      ⨀    2.30 – 3

  ⨀     ⨀    about 5.10  

  ⨀   ⨀    5.42    

  ⨀  ⨀ no time noted doubtful measurement

  ⨀    ⨀  8.30      

 10.25        ditto    

Again leaf distance begins to diminish before leafes are perpendicular—

At 5.46 the leaf angle was about (a); so that between 6.46 & 8.30 the leaf sunk through an d angle (a) while the leaf distance altered very little; its great change have taken place by 5.10—

[diagram] a

15

4/

Tall Young Plant

First Pair of Leaves {CROOKED}

  ⨀   ⨀    2.30 – 30

  ⨀   ⨀  about 5.10   

  ⨀   ⨀  5.50    

petioles as near together as is possible 8.30

     ditto ⎽  ⎽  ⎽  ⎽    10.25

The only use of this series is to show that the leaf distance begins to diminish before the leaves become perpendicular—

16

5/

Small Young Plant

Second Pair of Leaves

{first pair not old enough to measure}

  ⨀   ⨀  

 ⨀     ⨀    2.30– 3

 ⨀      ⨀   5.25   

 ⨀    ⨀   5.33   

 ⨀  ⨀    8.30   

Leaf distance begins to diminish before leaves are perpendicular. The main greater part of the diminution having taken place by 5.25

16v

Desmodium

Sleep— movements of main Petioles