<3r>
June 18' to morng of 20' 1878
Arachis hypogea circumnutation of leaf.
& sleep.t1
A fine leaf was secured to a stick so that «the» 2 terminal leaflets alone left free. —
Leaflet observed was 1 1/8 in length — obsrved under skylight as
here shown
[diagram labels]1
6 3/4.
5 1/2 inch
Temp. on 18th 161/2 to 17': on 19't2
17°—17 1/2. C.
The plant havg been shaken, «‹& tied›» & broght out of bright light
& petiole secured to stick , leaflet when first observd
«at 10°45 a. m» stood «with lateral edge» vertical by twistst3 of petiole, as when asleep.; & on 18th the
sole movemt was expandng «ast4 . day advanced» & after 4°
P.m the becoing vertical again for sleep..
On 19th (or next day) course more complex, «1»t5 descnded, ascended, «2»t6 descnded ascnded, «3»t7 descended & ascnded, as it went to
sleep. After sleep on both ‹nights›
«night» descended ,(ie leaf began to
open) ‹vry› early in
mornig — The plant either frm not being brighly illuminated or frm
not being hot. engh did not sleep so well as in Hot-House. — There
can be no doubt ‹circumntatn›
«circumnutates» in the day in the
same peculiar manner, as when night comes on & induces the
peculiar position of Sleep.—t8
Scientific
Practice: experimental design; experimental
observations
Physical
Characteristics: ruled in blue; pinholes; with impress
of pin; pale blue; wove paper
t1 & sleep.] added in pencil t2 9] written over in pencil '8' t3 twists] retouched t4 «as»] written over 'in' t5 «1»] added in pencil t6 «2»] added in pencil t7 «3»] added in pencil t8 in the…of Sleep.—] double scored in left margin
1. Note sighting tool in the left corner of the diagram.
Transcription and apparatus copyright the American Museum of Natural History