[174]

Beans radicles effect of Caustic on Sachs' curvature

June 8th 1879 7° 50' a.m.

(Jar A) (9th 8° 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 8° 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 8° 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

9° a.m

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

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

(3) Caustic (like 2) (9th 7° 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) 4° 20' P.m. all following 5 somewhat geotropic except (5) very slightly so.— 9th 7° 31° from vertically geotropic [calculations not transcribed]

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

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

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

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

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

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

[177]

Beans Radicles.

Caustic on tips & Sachs' Curvature

1879— June 12th 8° 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 8° a.m Jar E—

(1) bent from bean opposed to Sachs

(2) bent at right angles from bean (—15th 8° 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 8° 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 8° 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

8° a.m.

(1) 15' 8° 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 8° 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.—