[109]

Nov. 6th

sqr fixed 9° 30'

Spanish Chesnut

Jar B

Jar C Horse-Chesnuts Nov 8° 9° 30' a.m strips of Copper— also at 9° 15' on some Spanish-Chesnuts

(Nov. 9th In Big 7 Spanish C. tried repeatedly with sq. of sand-paper no effect.— Bit of lead [sketch] this caused of course deflection, & 8° 15' put square of card on deflected portion to see if this will increase curvature: also put same lead cap on another radicle.

(Nov. 10th I may say that I tried made about a dozen trials with sand-paper & shell-lac on radicle of Horse & Spanish chesnut, but none were affected. The radicles are extremely stiff & may well be that they require a much more powerful stimulus than a bit of card on tip.— I think so because I fixed curved bits of thin metal to base & obliquely across tips, & these became bent [illeg] curved towards their tips in nearly the same manner as in case of bean: it may of course been simply mechanical obstruction, but the appearance rather indicated curvature from unequal growth on the 2 sides)

[109v]

Square of Sand-paper (Spanish Chesnut)

shell-lacced to apex— Kept in dark — pinned to roof in Study.—

(1) Oct 27' 8° 45' (29th 8° dropped off refixed, no effect

(2) Oct. 27' 8°. 45'. (29th removed no effect & refixed) 30th 8° I think acted a little

(3) Oct 27' 8° 45— very short 1 young (29th. 8° slight curvature from sqr.) 30th 8° I think so.

(4) Oct 27' 8° 45, 2 secondary radicles, end of main radicle having been killed by some accident. Oct 29' 8°. 30 very short

(5) Oct 29th 8° 30' very short R.

(6) Oct 29' 8° 30' very short

(7) Oct 29' 8°. 30 very short

No curvature in any case to be trusted or with Horse-chesnuts

[110]

Nov. 15' 1878 Radicles of Horse-chesnut— Great Jar

8 Radicles some with bit of glass & shell-lac— others with ca sand-paper & gum.

(3 of radicles, marked internally with pin, had grown to considerable length in water) also some with sand-paper & shell

Nov. 15. 4 radicles of Horse-chesnut which had grown in water to between 1 1/2 & 2 3/4 in length, had were then kept in damp air (—Temp about 65°-F) with square of sand-paper fastened with shell lac to tips, but no curvature caused after 48°—

Jar B— all 4 germinated grown in water with sand-paper & gum. 8° 50' a.m. Nov. 15th

Nov 17' of the 12 radicles in this paper the card having been replaced, why they fell off none produced the least effect

[111]

Nov. 17th 1878

12°.

Radicle of Horse-chesnut.

Radicles old & not good ones Lunar Caustic

The 12 radicles which had been tried with glass & card with gum & shell lac, & which had not acted were washed & dried, & each touch 2 or 3 times on one side with stick, just damped of Lunar Caustic— Most of Roots rather old & long & not very healthy— after being touched their distal or lower portion immersed in water— Temp about 66° F— in dark.— Temp 66° F.

Nov. 18' 8° a.m In Big Jar the tips of the 8 radicles blackened all round— & no curvature

In the small jar the 4 very long radicles which had grown in water now all have their extreme tips turned towards blackened side.

(N.B I ought to have rubbed radicles with dry nitre of S stick & only once or twice.)

Nov. 19th 8° a.m— in Big jar tips all utterly killed & radicles, contorted.

à (A radicle 2.2 in length was actually .3 of inch in thickness — to show strength)