[71]

Radiation

(Used)

Feb. 7th

Mimosa pudica— I had to tie up 4 leaves, as either too old or cold checked sleep— one young seedling did go to sleep marked with pin

Exposed 7º 25' (Pot I brought in at 8º 25') Pot 2 brought in at 9º

Feb. 8' exposed clear sky & frost (see paper for Temp.) from 7º 23' P.m to 10º 8' (ie for 1.º 45º) with following results,

Feb. 9th 8º a.m of the 4 pinned open 2 utterly dead on the following morning, 1 I think injured which soon died & 1 not injured, so 3/4 killed:— Of the 5 with Cots closed or tied together, 1 utterly killed, 1 much injured which afterwards dies but I doubt whether growing axis killed, & 3 not injured. so that 2/5 killed.)

Oxalis corniculata — Cut off all first leaves which were not asleep exposed 7º. 25'— brought in at 9º.

(Feb 8th. 8º a.m. none of leaves seem injured the free ones awake!

(Feb. 8th did not go to sleep till quite late at night)

Nicotiana glauca exposed at 5º. 30'. I cannot make out anything certainly, as the y youngest leaves suffer so much more than the older ones.

N. B. There are notes about Cassia in Bundle about Cotyledons