7. That gemmules are thrown off by all physiological cells, not only during the adult state of the organism, but during all stages of its development. Or, in other words, that the production of these cell-seeds depends upon the adult condition of parent cells, not upon that of the multicellular organism as a whole.
[8] The experiments in graft-hybridisation were to prove that formative material (or gemmules) was actually present in the general tissues of plants and was capable of uniting with the gemmules of another plant and thus of reproducing the entire organism. For if the hybrid, afterwards produced, presents equally the characters of the scion and the stock, then formative material must have been present in the tissues of the scion, and it is demonstrated that the somatic tissues of the scion have exercised an effect on the germinal elements of the stock, inasmuch as it has caused their offspring in part to resemble it. Such facts Romanes considered to be fully in harmony with the theory of Pangenesis, and inconsistent with any theory which supposes that no part of the parent organism generates any of the formative material.
[9] To the Royal Society.
[10] For the Suppression of Vivisection.
[11] Mr. Grant Allen.
[12] Spiritualism.
[13] He had just lectured at the Royal Institution.
[14] It was subsequently published in the Fortnightly.
[15] He refers to the attack of typhoid fever in 1873.
[16] Mr. Romanes carried out this suggestion, or rather his sister, Miss C. E. Romanes, did; she kept a monkey for observation for several months, as is recorded at p. 484 of 'Animal Intelligence.'