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Professor Agassiz allows me also to make use of a very rich collection of injected preparations sent him by Professor Hyrtl, formerly of Prague, now of Vienna, for the proper exhibition of which I had a number of microscopes made expressly, by Mr. Grunow, during the past season. All this illustrates what has been done for the elucidation of the intimate details of formation of the organs.
"The accomplishment of no other function," Hyrtl remarks, "is so intimately connected with the mind and yet so independent of it." The process is still, however, but imperfectly understood; see Art. "Fécondation," by Ed. Retterer, in Richet's Dictionnaire de Physiologie, vol. vi, 1905.
The extrinsic muscles which serve to move the external ear, and the intrinsic muscles which move the different parts, are in a rudimentary condition in man, and they all belong to the system of the panniculus; they are also variable in development, or at least in function. Canestrini quotes Hyrtl.
Another unfortunate tendency among the Arabs was their liking for the discussion of many trivial questions. Hyrtl, in his volume on "Arabian and Hebrew Words in Anatomy," declares that it is almost incredible how earnestly some trivial questions in anatomy and physiology were discussed by the Arabs. He gives some examples. Why does no hair grow on the nose of men?
Hyrtl, however, suggests that this invention of Mondeville's was probably very helpful, and was brought about by the impossibility of preserving bodies for long periods as well as the difficulty of obtaining them. One of the maxims of the old Greek philosophers was that good is diffusive of itself. As the scholastics put it, bonum est diffusivum sui.
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