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Oct 30' 77 Passiflora gracilis

Internode revolves & tendril in 1°, so more delayed in this experiment

Stem secured close beneath tendril.

To ascertain how far negative apoget geotropism destroys nutation. Diagram I shows nutation traced on bell glass made in study (too cold & tendril rather old) in 3° 16'— I then bent down stem, so that tendril hung down at very high angle. Tracings made on bell-glass & I think on nearly same scale but not all sure— This destroys much of value of observation. In young stem in new position, I touched end of tendril, which curled up, & as I traced course by line joining its tip & mark [believing], trial spoiled, but as far as I could make out there was no nutation for 1° 32' & doubtful until 3° 40' had elapsed; & then the t. made a being in horizontal position having much risen made a circle in 5°; (see diagram II) but the circle was only between 1/2 & 1/3 ??? of circle first made & it took 5° to make. Therefore nutation delayed, & perhaps decreased in lateral extent but I am not at all sure that scale the same.—

Nov. 2d Traced (diagram 3) between 8° 30' & 10°. 45' — complete ⨀ wd have been completed in about 2°. 30'. Then bent down end of shoot with fresh tendril till it was almost perpendicularly down & traced magnified in nearly same degree Diagram 4. between 10° 45 50, & 6° ie in 7° 1/4 10.25, ie nearly 12 hours & we see 3 little attempts to nutate in circle, which rising up overpowered by ageotropism.

But the case is not so good as it wd have been for the tendril next morning (Nov 3d) still tied down, made only figure 5, between

over

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(a) 6° 45' & 2h 15'; Here we see attempt to make good-size circle, but I think t. getting old & study too cold.—

(Nov. 12' 12° The tendril looked as if fixed, & too old to nutate, so I fixed mark & found this the case.

Therefore the fact of the t. nutating so little the day after the bending down, does not destroy the value of my observations—