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Pelargonium zonale circumnutation of leaf

F128

(same scale give all lettering, six sets.

The dotted lines are merely to show to which dots the Hours & dates refer. There are two broken nocturnal lines.

P( Pelargonium zonale: downward movement & circumnutation of young leaf, illuminated from above, traced on horizontal glass from 9 3o Jun 14th to 10. 30 P.m

Apex of leaf 9 1/4 Bases of petiole Apex petiole of leaf 11 1/2 inches from glass, so tracing considerably moderately magnified

Temp. 15˚ to 16 1/2˚ C., perhaps too low for rapid growth.

[258v]

642 31

ChapterE 10

Verbascum lychnitis, (do) highly self-fertile

Vandellia nummularifolia (do) perfect flowers produce a good many capsules.

Bartsia odontites (do) Covered-up plants produced a good many seeds; but several of these were shrivelled, nor were they so numerous as those produced by unprotected plants, which were incessantly visited by hive and humble bees.

Specularia speculum (Lobeliaceæ), covered plants produced almost as many capsules as the uncovered.

Lactuca sativa (Compositæ), covered plants produced some seeds, but the summer was wet and unfavourable.

Galium aparine (Rubiaceæ), covered plants produced quite as many seeds as the uncovered.

Apium petroselinum (Umbelliferæ), cov covered plants apparently were as productive as the uncovered.

Zea mays (Gramineæ), a single plant in the greenhouse produced a good many grains.