[257]

Nov. 2d

Veg marrow Dark Horizontal glass [sketch]

[data not transcribed]

Used

[257v]

[Proof sheet of Forms of flowers, p. 57.]

[258]

Vertical glass Marrow axis secured in Light [sketch]

Movement of Cotyledon

Nov. 5

[data not transcribed]

(Used)

[258v]

[Proof sheet of Forms of flowers, p. 56.]

[259]

Nov 6th Marrow

[data not transcribed]

(Used)

[259v]

part is shown by the many cases in which negros, after having resided for some time in a colder climate, have become to a certain extent liable to tropical fevers. 47 (46) Residence in a cooler climate likewise affects the white races; for during the fearful epidemic of yellow-fever in Demarara during 1837 Dr Blair found that the death-rate of the immigrant was proportional to the latitude of the country whence they had come. With the negro the immunity as far as it is th

[Descent 1: 243-44: "That acclimatisation plays a part is shewn by the many cases in which negroes, after having resided for some time in a colder climate, have become to a certain extent liable to tropical fevers.47 The nature of the climate under which the white races have long resided, likewise has some influence on them; for during the fearful epidemic of yellow-fever in Demerara during 1837, Dr. Blair found that the death-rate of the immigrants was proportional
47 Quatrefages, 'Unité de l'Espèce Humaine,' 1861, p. 205. Waitz, 'Introduct. to Anthropology,' translat. vol. i. 1863, p. 124. Livingstone gives analogous cases in his 'Travels.'
to the latitude of the country whence they had come. With the negro the immunity, as far as it is the result of acclimatisation, implies exposure during a prodigious length of time; for the aborigines of tropical America, who have resided there from time immemorial, are not exempt from yellow-fever; and the Rev. B. Tristram states, that there are districts in Northern Africa which the native inhabitants are compelled annually to leave, though the negroes can remain with safety."]