22

 Melilotus officinalis July. 1878 

circumnutation & sleep of terminal leaflets

A fine plant in flower. A young  leaf, together with petiole 1 inch in length — main petiole Stem secured to stick at base of petiole. apex of leaflet 5 3/8 from vertical glass, observed under skylight.— A very glass filament fixed almost transversely across terminal leaflet.— with 2 transplane Sights
(There is curious way in which leaf sleep — )  it did not sleep well especially on 2d night being apparently disturbed by being tied close to base of petiole or owing to glass filament. See Tracing shows — On 2d day descended in morning, then ascended, again descended, & if it had slept well wd again have ascended, if sleep had occurred properly — we learn only that leaflet circumnutates independently of nocturnal movement.—

Temp. on 2d 17 1/2—18° C. on 3d 16 1/2 to 17 1/2. —

Cirmunutation of leaf stem secured