[63]

Red Cabbage Cot

Oct. 19th Horizontal glass Did not sleep last night too old

Plant kept darkness yesterday now under brown paper cover

Free Plant for nutation Bristle at nearly ∠ to 2 Cots. Black dot [sketch]	Plant secured to stick Bristle longitudinally to one cotyledon Red Head [sketch]
Black	Red
8°. 15' Traced in black on right hand	8°. 15'    Traced in red black
8. 52   a trifle to the right	9° 52' 8. 52 a trifle to right to the right & from light
9 24' to light a little to right from the light	9. 25' from to light
10. 30   up to light	10. 30 from light
on let left Hand 8. 15.	on right
11.20 a vy little to left	11° 30 to light & left
11. 55 a trace up & to left	11. 55   same course
12. 9 a short distance in same course	12. 10 to light & right
12' 23 same large dot a trace to left	12 23 to left & light
12 44 nearly same spot   (Used)	12. 44   a little to the right
1° 5 a trace to light	1. 5' to right
1. 37 a little to light & left	1 37 back to left
1. 53   same spot	1. 53 from light & to right short way, so to be on old line
2. 21 a little back from light	2. 21 in same course
vy small { 2. 43 an atom in same course 3. 2 gone back to light, dot on old line. 3° 22' very little way in centre of old upper loop 3 . 55 still in nearly same place no dot	} 2. 43 a little up to light & red 3. 2 to the left 3. 22 .   In centre of upper loop 3. 55 still in nearly same place vy slow no dot
do  4. 30	do    4. 30
7' 20' a trifle on light side (not connected)	7 20'a trifle on light side (not connected)
8 45 to light & left	8' 45 almost same spot
10 30 to right very short way	do 10. 20
	Is Cot well fixed
Has darkness or age checked movement	(19h not asleep)

[63v]

72 84

Chap. 8 Insects.

In this class, the Lepidoptera alone afford the means of judging of the proportional numbers of the sexes; for they have been collected with special care by many good observers, and have been largely bred from the egg or caterpillar state. I had hoped that some breeders of silk-moths might have kept an exact record, but after writing to Frances and Italy, and consulting various Treatises, I cannot find that this has ever been done.

The general opinion appears to be that the sexes are nearly equal, but in Italy, as I hear from Prof. Canestrini many breeders are convinced that the females are produced in excess. The same naturalist, however, informs me that in the two yearly broods, produced by of the Ailanthus silk-moth (Bombyx cynthia) the males greatly preponderate in the first, whilst in the second the two sexes are nearly equal, or the females rather in excess.

In regard to Butterflies in a state of nature several observers have been much struck by the of apparently enormous preponderance of the males in many cases 56. Thus Mr. Bates 57 *(T) in speaking of the species, no less than about a hundred in number, which inhabit the Upper

[Descent 1: 309: "In this class, the Lepidoptera alone afford the means of judging of the proportional numbers of the sexes; for they have been collected with special care by many good observers, and have been largely bred from the egg or caterpillar state. I had hoped that some breeders of silk-moths might have kept an exact record, but after writing to France and Italy, and consulting various treatises, I cannot find that this has ever been done. The general opinion appears to be that the sexes are nearly equal, but in Italy as I hear from Professor Canestrini, many breeders are convinced that the females are produced in excess. The same naturalist, however, informs me, that in the two yearly broods of the Ailanthus silk-moth (Bombyx cynthia), the males greatly preponderate in the first, whilst in the second the two sexes are nearly equal, or the females rather in excess.
In regard to Butterflies in a state of nature, several observers have been much struck by the apparently enormous preponderance of the males.56 Thus Mr. Bates,57 in speaking of the species, no less than about a hundred in number, which inhabit the Upper Amazons, says that the males are much more numerous than the females, even in the proportion of a hundred to one."]