Show sense of smell the tenth part of a grain of mush will continue for years to fill a room with its odoriferous particles and at the end of that time it will not be ap preci ably diminished in wel weighty itiC A cubic inch ot of air arising from the flame of a bunsen burner has been found to io contain to no fewer than four hundred and eighty nine million dust particles A drop of blood that might be sus BUS pe from the point of a needle contains about a million of red corpuscles corpus cles yet although matter Is so BO mael causly divisible the olfactory nerves are infinitely more sensitive much yet to be b investigated with reference to these nerves which dla dig criminate with such apparently miraculous ra accuracy Har harpere Harper pera 8 weekly |