pass
himself, within the narrow groove of physical investigation. He took
furlough for one year, in extension of the period of his Deputation,
and applied himself vigorously to the investigations, which he had
already commenced in India and received facilities from the Managers of
the Royal Institution to work in the Davy-Faraday Laboratory. He next
read, at the Glasgow meeting of the British Association, in 1901, a
paper 'On the Conductivity of Metallic particles under Cyclic
Electro-magnetic Variation.' Then, in March 1902, "Prof. Bose" says the
_Nature_ "performed a series of experiments before the Linnean Society
showing electric response for certain portions of the plant organism,
which proved that as concerning fatigue, behaviour at high and low
temperatures, the effects produced by poisons and anaesthetics, the
responses are identical with those held to be characteristic of muscle
and nerve." The Linnean Society published, in its Journal, in March
1902, his paper 'On Electric Response of Ordinary Plants under
Mechanical Stimulus.' He then communicated to the Societe de Physique,
Paris, his paper 'Sur la Response Electrique dans les Metaux, les Tissu
Animaux et Vegetaux.' The Royal Society published, in April 1902, his
contribution 'On the Electromotive Wave accompanying Mechanical
Disturbance in Metals in contact with Electrolyte.' He was next asked by
the Royal Photographic Society to give a discourse 'On the Strain Theory
Vision and of Photographic Action,' which was published by the Society,
in its Journal, in June 1902. He then wrote a paper 'On the Electric
Response in Animal, Vegetable and Metal,' which was read before the
Belfast meeting of the British Association, in 1902. The President of
the Botanical Section at Belfast, in his address, observed "Some very
striking results were published by Bose on Electric Response in ordinary
plants. Bose's investigations established a very close similarity in
behaviour between the vegetable and the animal. Summation effects were
observed and fatigue effect demonstrated, while it was definitely shown
that the responses were physiological. They ceased as soon as the piece
of tissue was killed by heating. These observations strengthen
considerably the view of the identical nature of the animal and
vegetable protoplasm."

Dr. Bose then brought out a systematic treatise embodying the results of
his researches under the significant title of 'Response in the Living
and Non