plex responses of the animal had been foreshadowed in the plant. The
phenomena of life in the plant were thus not so remote as had been
hitherto supposed. The plant world, like the animal, was a thrill and a
throb with responsiveness to all the stimuli which fell upon it. Thus,
community throughout the great ocean of life, in all its different
forms, outweighed apparent dissimilarity. Diversity was swallowed up in
unity.

--_Amrita Bazar Patrika_, 20-1-1913.

INVISIBLE LIGHT

A most instructive and interesting lecture was delivered on Thursday,
the 30th January, 1913, at the Calcutta University Institute Hall, by
Dr. J. C. Bose, on the above subject. It was illustrated with
experiments and in spite of the technical nature of the subject, the
manner of treatment made the discourse extremely palatable and easy of
apprehension to the lay understanding and intelligence. The truths of
science could seldom be exposed so light-heartedly and in language
leavened with balmy humour. The lecture was very largely attended by
ladies and gentlemen, European and Indian, representing the light and
leading of the city. The chair was taken by Mr. W. R. Gourlay. Amongst
those present we noticed the Hon. Mr. Ramsay McDonald, Mr. Justice
Harington, Mr. Justice Chaudhuri, Hon'ble Mr. Gokhale, Hon'ble Mr. Lyon,
Hon'ble Mr. D. N. Sarvadhikari, Sir Gurudas Banerji, Hon'ble Mr. Apcar
and Dr. Chuni Lal Bose Rai Bahadur.

The Chairman, in a few well chosen words introduced the lecturer.

Professor Bose in going to deliver his highly interesting lecture first
showed how on account of the imperfection of our senses we fail to
detect various forces which play around us. We are not only deaf, but
practically blind. While we perceive eleven octaves of sound, we can see
only a single octave of other vibration which is called light. In order
to detect the invisible light a special detector has to be devised.
Prof. Bose showed his artificial retina previously exhibited at the
Royal Institution which not only detected luminous radiation but also
invisible lights in the intra red and ultra violet regions. In the
course of his remarks illustrating the nature of electric or Hertzian
waves, which gave rise to the invisible radiation he proceeded to
enumerate some of the conditions necessary for experimenting with them,
and to describe the apparatus he had invented for the purpose. Hertz had
used waves which were about 10 metres in length. It was i