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Primula Sinensis 1877

Traced on Horizontal glass.— Plant had for 1 or 2 day held same relative position.—

Oct 15' filament of glass attached to little free stem, not touching cotyledon & no true leaves formed. From 8° 55 to 10° 27 to light, then back from light till 12° 7', then steadily to light to 4° 35— I then changed position of standard mark; continued to move to light till 5°. 8; then went back; after 7° 25', moved very slowly again in direction of light (like the 1st plant) but slowly: & after 8° 30

By next morning had moved from light & to the left— I do not know what to think, unless heliotropism replaces & destroys nutation.

(Oct 16th Tracing as yesterday; plant in same position; but tracing more magnified (Perhaps filament of glass gummed along axis interfere with nutation) See diagram 2. The great zigzagging coincident with day become very black— movement in evening exaggerated by sliding of glass. On both days moved toward light in evening. There must be, I think nutation.