[35]

Klinostat Sachs Curvature

Phaseolus. pinned in damp air, (damp cover to cork & bell glass lined with wet blotting paper): the beans were soaked a on the klinostat & the machine has kept going all the time except for half a night after they grown well & when it did not effect the curve of the hypocotyl— The roots were wetted every morning

The bell glass in which they grew was covered with black paper externally; and klinostat stood in the dining room.

On Mar 25, 4 out of 7 had roots varying from 1 to 11 mm in length; 2 (Nrs 1 & 7) were crooked & irregular

Mar 26 The angle which the hypocotyl makes with with the horizon when the bean is looked at so was measured [sketch] ß, it may be called the angle which the root makes with the bean— since the edge of the bean was placed horizontal

[table not transcribed]

The side of the bean with the hilum was pl extended horizontally, in which position, the radicle with the short undeveloped hypocoty wd naturally grow perpendicularly downward, but they (over)

[35v]

[diagram]

formed with the lower surface of the bean, angles varying between 6° & 55° & on average of 7 cases an angle of 27°; so that they were deflected by Sachs curvature 1° from the perpendicular downward course, which they wd naturally follow through [illeg] to the action of Geotropism

[calculations not transcribed]