. The science and practice of medicine . T be used or not. To apply it, it is held by its flat sides,at a point about its centre of gravity, between the thumb and the threelast fingers, whilst the index, slightly bearing on the back of the rule,regulates the contact of the points with the skin, which must be in accu-rate parallelism with the surface. Fig. iiii|mi|iiii|i!imimiiii|in 0 SO 40 50 6= 5=53 ?» Q Dr. Sieveking, of London, in 1858,J devised another aesthesiometer,which is not dissimilar from the instrument, stangehzirkle, used by Weberin his physiological researches. The handle of
. The science and practice of medicine . T be used or not. To apply it, it is held by its flat sides,at a point about its centre of gravity, between the thumb and the threelast fingers, whilst the index, slightly bearing on the back of the rule,regulates the contact of the points with the skin, which must be in accu-rate parallelism with the surface. Fig. iiii|mi|iiii|i!imimiiii|in 0 SO 40 50 6= 5=53 ?» Q Dr. Sieveking, of London, in 1858,J devised another aesthesiometer,which is not dissimilar from the instrument, stangehzirkle, used by Weberin his physiological researches. The handle of Dr. Sievekings aesthesio-meter is shorter than that of Dr. Brown-Sequards, though the principleis the same. Later (1859), Dr. John W. Ogle, believing that there wouldbe several advantages in an instrument which combined the principle ofthe beam compass with that of the two-legged compass, had made hisaphemetric compass.^ In Fig. 85 is represented another aphemetric compass, by Mr. Stohl-man, of Messrs. G. Tieman & Co., surgical cutlers, of this city. It is theordinary mathematical compass, provided with a brass scale attached toone of the legs. It is a convenient instrument, but has the fault of beingtoo long. The best instrument is the compass of Dr. Jaccoucl, madeby Colin & Robert, of Paris, which is only nine centimeters long, with * Com
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Keywords: ., bookcentury180, booksubjectmedicalgeography, booksubjectmedicine
