[174]

Beans radicles effect of Caustic on Sachs' curvature

June 8th 1879 7º 50' a.m.

(Jar A) (9th 8º a. m. no difference in S. curvature in the 2 lots— now filled up water to cover radicles.)

(1) no caustic (short)

(2) caustic

(3) caustic

(4) caustic

(5) caustic

­­─ 5 caustic

(6) no caustic

(7) no caustic

(8) no caustic

(9) no caustic

4 cau no caustic

[175]

Beans radicles — effect of Caustic on Sachs Curvature.

Jun 8th 1879 8º 10' a.m.

Jar E (9th. 8. a.m no marked difference, but some with caustic have more of Sachs curvature than the others

(1) caustic

(1) bis caustic

(2) caustic

(2) bis caustic

(3) caustic

(4) caustic

(5) caustic

7 Caustic

5 on other part [=] 12

(6) (0)

(7) (0)

(8) (0)

(9) (0)

(10) (0)

(10) bis (0)

(10) bis (0)

7 [+] 4 [=] 11 no caustic

I must say

(First day in dry air ─ 2d day dropped in water)

June 11th 1879 8º a.m after 3 days

Final conclusion about the 12 radicles with & without caustic on tips for 1' day: suspended over & then in water — Those without caustic exhibit Sachs curvature much more regularly, of all 12, only one almost vertically down & one grown rather laterally not but together with Sachs curvature.—

Of the 12 with tips with caustic, at least 5 considerably distorted one of latter growing quite reversed — 4 very nearly perpendicularly— some have grown at first perpendicularly & then thin tips have become curved at right angles.

Irregularity is the characteristic feature of those with tips cauterised (like Sachs & cutting off tips), together with the action, more or less plain of Sach's curvature — There are only 3 in which Sachs curvature does not act at first, afterwards as geotropism acts but little there is much irregularity.)

These notes apply to both pages.—

[176]

Peas suspended horizontally over waters— tips of 1/2 touched

(Big Toppling Jar) 2 or 3 times with Caustic — to see whether Geotropism annulled

June 8th 1879

9º a.m

(1) caustic 4º 20' somewhat geotropic (9th 7º 50' geotropic at about 45º beneath horizon.

(2) Caustic 4º 20, Horizontal (9th 7º 50' quite horizontal— blackened tip. 1/2. m.m.

(3) Caustic (like 2) (9th 7º 50 like (2) in all respect

(4) Caustic (like 2) (do) (I feel sure that though I did not measure their length that these radicles have grown greatly.)

(5) Caustic like (2) (do)

6 (0) 4º 20' P.m. all following 5 somewhat geotropic except (5) very slightly so.— 9th 7º 31º from vertically geotropic [calculations not transcribed]

(7) 0 (9th 7º 50' 30º from vertically geotropic

8 (0)) (9th 7º 50 25º from vertically geotropic

9 (0) 9th 7º 50 33º/ 57 90from vertically geotropic 57

10 (0) (7th 7º 50' 47 / 43 from vertically geotropic 43º

Conclusion there can be no shadow of doubt that touching apex with caustic stops geotropism

9th 4º 20' P.m. all in same state— There can be no doubt

[177]

Beans Radicles.

Caustic on tips & Sachs' Curvature

1879— June 12th 8º a.m.

Radicles very short & young— well touched dry with caustic & in few minutes afterwards just dipping perpendicularly in water.— 10 touched & 10 as standards.—

14th 8º a.m Jar E—

(1) bent from bean opposed to Sachs

(2) bent at right angles from bean (—15th 8º a.m now hooked & reversed)

(3) bent considerably from bean & to one side

(4) bent right over bean

(5) completely reversed, growing upside down.

Jar H

(6) bent little from bean

(7)— one bean & rather laterally

(8) at right angle from bean

(9) at right angles laterally

10 almost at right angles laterally

Wonderful contrast in regularly between the 2 lots0

After 4 days

(16th 8º a.m the 5 in the jar with caustic a wonderful contrast in being distorted in all direction compared with 5 control specimens.— Sachs curvature not well marked in any of 10)

Jar E

In the 5 corresponding beans with no caustic there is hardly any of Sachs' curvature

(16th 8º a.m same remark as above to 3/5 of those with caustic— Sachs curvature well marked in one of Caustic & 2 of the controls)

(27 tried)

8/10 distorted

5/12 do — & even some of other with tips

2/5 were distorted

Wonderful contrast in [illeg] between the 2 lots (over)

[177v]

June 13th. 10 more radicles 1/2 & 1/2, as on other side

8º a.m.

(1) 15' 8º a.m very straight

(2) (do) — tip curved from bean

(3) (do) nearly straight has not grown much

(4) (do) tip Hooked bent rectangularly over bean

(5) (do) — tip slightly Hooked to one side

The 5 control beans have grown to greater length & shows Sachs' curvature much more plainly — I think caustic doe interfere with Sachs curvature!

aft 3 day

16th 8º a.m. This lot of 10 have grown far better than other, as from the first they were not so deeply immersed.— The 5 control spec. all show Sachs' curvature well pronounced. but are other wise nearly straight—

Of the 5 caustics one has grown into complete hoop—: 2d has grown down on bean. 3d laterally; a 4th laterally but only at tip; the 5th nearly straight— Sachs curvature well marked in 3 or 4 of these—

I may say that caustic does not always interfere with Sachs' curvature — It is clear that radicle tends to certain extent to grow straight down, in position in which placed, guided by skin of bean &c. & habit already established.—