[188]

Radicles of beans

Sept. 28-9th 1879

28th F. cut off at 7° 15' P.m 1 1/2 m.m of tip of 6 radicles & placed horizontally over water.— 29th 7° 40' a.m ie after 12 hr these 6 show no geotropism: they

now vary in length Horizontal between 47 & 23 mm. & judging by eye have grown

Frank has described this state at 7° 15 4°. 30' P.m. & has shown great growth

(Sept. 30th 7° 45' a.m.— i.e. after 21°. were a few degrees below 4 3 still quite horizontal with reference to Bean itself; one very slightly geotropic. The 2 others ie aft 36° have grown against side of jar & are mechanically bent down.

Five Control radicles placed at 7° 45' P.m horizontally over water & now 7° 45 am

(29th) aft 12° they are all geotropic 4 strongly & 1 slightly.— They now vary in length between 39 & 22 mm.

see Frank page (B) for state at 4° 30' P.m. 29th.

Sept 30th. 7° 45' am well geotropic, but not so well as often occurs.

6 Radicles Vertically dependent Conclusion

28th 7° 15' P.m F. cut off 1 1/2 mm of tips & suspended vertically over water; now 29th 7° 45' a.m, they are straight down, but 2 of them are strongly curved, & 1 moderately curved by Sach's curvature—

Marked by Big Pins to show degree of curvature

30th 8° a.m marked others with Big Pin to show amt of Sachs Curvature.

Oct 4th— These have not grown irregularly & Sachs curvature not modified sensibly — they have grown greatly in length.

(A

Faba. (Long Pod) Sep 28. 1879 7.15 pm in Study with fire

1 1/2 mm cut off and put in damp air 6 vertical, 6 [horizontal] also 5 control (not cut) put horizontal.

Jar of Jar with verticals Radicles.—

Sep 28          Sep 29. 4. 30

(1) =    27mm —         46 m.m.            Vertical — 18° Sachs

(2) =    41        69        45° Sachs — 65 mm Sep 30. 8 am

(3) =    21 —   36        Sep 30 8 am 73mm

15° Sachs tip bent in reverse direction

(4) =    29 14 .             31        — about 40° Sachs & about 25 to the left

(5) =    17 29—           53        48° Sachs    (Sep 30 8 am. 67 mm)

(6) =    17 —   29        15°. Sachs

Therefore have  all angles measured with vertical (see  grown greatly, though tips cut off  Back)

Jar  with Horizontal Radicles

            Sep 28             Sep 29— 4 25 pm

1 =       17 —   34        4° above Horizon

2 =       26 —   49 ....   18° below

3 =       37 —   61 .      Main root 8° below, extreme tip bends slightly up

4 =       20 —   35        8° below

5 =       32 —   53        5 terminal centimeter 10° below, basal part horiz

6 =       21 *     38        5 below

* Cut off about 1 3/4 mm

(B

Faba— Controls

Sept. 29th 4 30' P.m.

Placed Horizontally over water with tips not cut off.

1 — abt 45 below

2 45° below

3 30.

4 80 below

5. 45 below → Only last centimeter bent & abt 45 below is now 48mm & was 35 ∴ has grown

[191]

Tips cut off Final conclusions

Sept 28th & Oct 5th—

Control put in same case, but we had tried very many score & knew perhaps that tall when a half been [illeg] geotropism in 12 hr

14 [+] 5 [+] 4 [=] 23 had tips cut off for 1 1/2 mm. After 12 hr. these were not affected by geotropism, where the controls become greatly geotropic in this time. — being inclined at 45° below horizon After 24 hr. some became slight showed a trace geotrop only [illeg] about 10° beneath horizon, whereas & — one alone considerably viz 40°.

They had all increased greatly in length

They showed no great irregularity in growth

6 with tips 1 1/2 mm were placed vertically down & these after 6 days have not grown very irregularly

see above 23 [+] 9 with 2 m. [+] 6 vertic [=] 38 — No 37. on account of 1 with punctum not cut off