23

Beans Secondary Roots

May 25th. 8° 45' a.m 1878 fixed bits of Sand-paper with shell lac to a number of s 17 Secondary radicles (all quite straight except slight downward curvature) in various positions— most of the radicle rise from hypocotyl, close beneath cotyledons —. suspended to lid of Bell-glass—

  2°. 30' I can see no sign of bending

  17 cards attached— 4°. 45' P.m. no effect

(Tied up some secondary roots (5° P.m) so as to make them perpendicular & affixed card)

(Some of roots with cards have been pulled (5° P.m) so as to be perpendicular, marked with black dots at bases)

(May 26th 8° a m 4 out of the 17 are certainly a little affected Those compelled to be perpendicular downwards not more affected than the others — It thus seems that (somewhat like Geotropism) that these lat.. radicles slightly & slowly affected by contact

May 26th 5° P.m. Five are now clearly affected by cards, & none of them are those made perpendicular downwards.

(These Secondary roots had been grown in water, but observed with cards in damp air.)

27th 8° 30.   Still same 5 bent & no more — one bent far upwards, or in opposition to Geotropism.

23v

Peas Radicles Sensitiveness. of May 25/ 78/ 

Peas transfixed with pins