[8-9]

Amphicarpæa

Circumnutation of a terminal Leaflet & whole leaf

[data not transcribed] F 163.

(1/3 scale 4 sets of lettering with blue lines: no other letters to be given.)

Amphicarpæa monoica: circumnutation & sleep of leaf; movements carefully observe apex 9 inches from the vertical glass; tracing as originally made much enlarged, here reduced to 1/3. Plant illuminated from above. Temp. 17 1/2° - 18 1/2° C.

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Introduction

Mr Galton sent me at the same time the projections which he had made of the measurements, and they evidently formed fairly regular curves. He appends the words "very good" to those of zea and Limnanthes. He also calculated the average height of the crossed and self-fertilised plants in seven of the tables, by a more correct method than that followed by me, for instance, namely by including the heights as estimated in accordance with statistical rules, of a few plants which died before they were measured; whereas the heights of the survivors alone were added up by me, and the product divided by their number.

The difference in our results is in one way highly satisfactory, for the average heights of the self-fertilised plants, as deduced by Mr. Galton, is less than mine, in all the cases excepting one in which our average are the same; and this [shows] that I have by no means exaggerated the superiority of

[Cross and self fertilisation, pp. 18-19: "Mr. Galton sent me at the same time graphical representations which he had made of the measurements, and they evidently form fairly regular curves. He appends the words "very good" to those of Zea and Limnanthes. He also calculated the average height of the crossed and self-fertilised plants in the seven tables by a more correct method than that followed by me, namely, by including the heights, as estimated in accordance with statistical rules, of a few plants which died before they were measured; whereas I merely added up the heights of the survivors, and divided the sum by their number. The difference in our results is in one way highly satisfactory, for the average heights of the self-fertilised plants, as deduced by Mr. Galton, is less than mine in all the cases excepting one, in which our averages are the same; and this shows that I have by no means exaggerated the superiority of the crossed over the self-fertilised plants."]