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Its predictions are stunningly accurate, and its power to grasp the unseen ultramicroscopic world has brought us modern marvels.

Another of the ultramicroscopic microbes is perhaps the cause of influenza which carried off in a few months more victims among young people than the greatest war in human history did in over four years.

In this way as well as by the inoculation of animals the presence of the ultramicroscopic kinds may be demonstrated.

We hastened to assure the Professor that, in accordance with the high standards of honour represented by our journal, we should of course regard anything that he might say as ultramicroscopic and treat it accordingly.

Horse-sickness takes ten short days to develop after infection, and the organism is so tiny that it passes through the finest filter and is ultramicroscopic.