determined only by a careful examination of the case. And finally we would exercise some reserve in entertaining the suggestions for the acoustic education of horses which have come from various sources. Colonel Spohr[77] whom we have just been mentioning, thinks that it would not be a difficult matter to get a horse to respond with a walk to one smack of the lips, with a trot to two smacks, and with a galop to three, and then he could be made to slacken his pace once more into a trot in response to one long-drawn "Pst!" and to stop in response to two. Others have gone even further. Decroix,[78] at one time leader in veterinary affairs in France, conceived the idea of working out a universal language as regards the commands that are given to horses, in the humane purpose of sparing them the whip. He called it "Volapuek hippique." For the commands "go," "right," "left," and "halt," he suggests these: "Hi!" "Ha!" "He!" and "Ho!" respectively. From these it was possible to make eight combinations, such as "Hi! Hi!" for "Trot!" "He! He!" for "Left about" (while the single "He" was to mean "Forward, to the left!") "Ho! Ho!" for "Back!" etc. Decroix thought that the whole system could be inculcated in a very few lessons. He even had a medal struck which was to be awarded to the driver or rider who should first exhibit a horse, thus instructed, to the Societe Nationale d'Acclimatation de France (of which Decroix was president). Eight years have elapsed since then, but we have heard of no one who has earned the medal mentioned. In the future greater care will probably be exercised in the putting forth of such suggestions, and two sources of error may be guarded against, viz.: involuntary movements on the part of the rider or driver, and imitation of the horses amongst themselves. (One horse, guarded by an experienced rider, may serve as copy for ten others with inexperienced men in the saddle.)]