The Microbe is so very small br You cannot make him out at all, br But many sanguine people hope br To see him through a microscope. br His jointed tongue that lies beneath br A hundred curious rows of teeth; br His seven tufted tails with lots br Of lovely pink and purple spots, br On each of which a pattern stands, br Composed of forty separate bands; br His eyebrows of a tender green; br All these have never yet been seen-- br But Scientists, who ought to know, br Assure us that they must be so....