. Il Wilder un quarto di secolo il libro: una raccolta di documenti originali dedicata al Professor Burt Green Wilder a chiusura del suo venticinquesimo anno di servizio in Cornell University (1868-1893). Wilder, Burt G. (Burt verde), 1841-1925; zoologia, anatomia e fisiologia; evoluzione; Afro-americani. 238 William Christopher Krauss 'J i muscoli delle braccia e delle gambe e sebbene le cifre possono variare alquanto in ciascuna prova, sono ancora abbastanza preciso per indi- cate i progressi di spreco. Il dinamometro è per- haps lo strumento migliore per stimare la potenza dei flessori delle dita e della mano muscoli. Esso

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. The Wilder quarter-century book: a collection of original papers dedicated to Professor Burt Green Wilder at the close of his 25th year of service in Cornell University (1868-1893). Wilder, Burt G. (Burt Green), 1841-1925; Zoology; Anatomy; Physiology; Evolution; African Americans. 238 William Christopher Krauss 'J arm and leg muscles, and although the figures may vary somewhat at each trial, still they are accurate enough to indi- cate the progress of the wasting. The dynamometer is per- haps the best instrument for estimating the power of the flexors of the fingers and hand muscles. It consists of an oval steel spring with a dial and index in the center. Com- pression of the spring is indicated on the dial in pounds and kilograms. This instrument is by no means accurate or per- fect as each succeeding trial may give a different reading ac- cording to the strength exerted by the patient. It is my prac- tice to take the average of two or three compressions and this result I consider approximately coiTect. For estimating the strength of the legs several appliances have been suggested by Dana, Birdsall, Fere, and d'Onimus, but none have en- joyed universal adaptation among neurologists. An apparatus which I have recently described* approaches, W .! in my opinion, the solution of this ^"Vj^i^^^ 1 problem, and has received the appel- lation, Pedo-dynamometer. It con- i, , „ . sists of a wide, heavy belt (a), its Ll, j/ inner surface padded so that its ad- / > / justment around the waist will not (C ^y J / be uncomfortable. A heavy web- V// bing (b), is looped through the belt Ji passing over the shoulders, which helps to retain the belt in its proper position. A common Mathieu dyna- mometer (c), is.connected with the belt (a), by means of a strong ad- justable strap, permitting it to be lengthened or shortened according to the stature of the patient. Con- nected to the dynamometer {c), is a stirrup {d), the base of which is padded for receiving the

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