Prof. Bose's discovery, now embodied in book-form and entitled "Response in the Living and the Non-Living," marks a new epoch in the advancement of modern science. It has been accepted by all scientific authorities, after the Professor had demonstrated it by experiments before a large number of scientific people in London, and notably by Lord Kelvin. Armed with the demonstrated facts of this discovery. Professor Bose maintains that the true test of the existence of life in any form of matter is its sensitiveness to external stimulus. According to this test he proves conclusively that no essential difference exists between animals and metals or vegetables. He has shown by scientific experiments that a bar of iron is not only as irritable and sensitive as a human body, but that it can be killed or poisoned in the same way as a human body can be killed or poisoned. According to his discovery, life pervades every object and part of Nature; and only some of these parts or objects can be said to be in a dead state, which means they can be deprived of their sensitiveness to external stimulus. If any part of our body is pinched, the nerve which connects that part with the brain, running all along, sends an electric current to the brain, vibrating under the pinch. The brain alone feels the pain inflicted upon any part of our body, says modern science; and it is proved by the fact that no pain is felt by us if our brain is deadened by chloroform. The galvanometer is a well-known and very delicate scientific instrument for detecting the presence of electric currents; it has a needle on a pivot, and the faintest electric current will cause a deflection of this needle. If at any intervening part of the electric current-bearing nerve in the human body the galvanometer be attached, and the end of the nerve pinched or otherwise irritated, then immediately the needle of the galvanometer will deflect, thus showing that the irritation of the nerve causes a current like that of electricity to be sent along it. This fact is now very well known to scientists, and Prof. Bose's investigations are based upon this well-known scientific fact.