Man and abnormal man, including a study of children, in connection with bills to establish laboratories under federal and state governments for the study of the criminal, pauper, and defective classes, with bibliographies . di-viduals. 11218251140 Per centof total. Averageerror. 27 35 11 48 54 29 18 8 4 0 1 35 45 45 55 55- 65 65 75 75 85 85 95 . .. 95 105. .. 105 115 The table contains observations on 173 males and 72 females. The first columngives limits of quickness, the
Man and abnormal man, including a study of children, in connection with bills to establish laboratories under federal and state governments for the study of the criminal, pauper, and defective classes, with bibliographies . di-viduals. 11218251140 Per centof total. Averageerror. 27 35 11 48 54 29 18 8 4 0 1 35 45 45 55 55- 65 65 75 75 85 85 95 . .. 95 105. .. 105 115 The table contains observations on 173 males and 72 females. The first columngives limits of quickness, the second column number of individuals, etc. Thoughthe time of the women is longer than that of the men, there is a compensatoryincrease in accuracy. It may be that everyday activity determines for each indi-vidual his range of error, and that time is the main element of variation. (Fitz.) TIME MARKERS. The form of time markers (fig. 10) below can be used in connection with an elec-trically maintained tuning fork of slow vibration. A small electro-magnet movesa lever carrying a writing point A, which marks on the surface of the paper of arecording instrument. It may also be connected with a clock, and used to analyze. Fig. 10.—Time marker for smoked paper. any other curve drawn at the same time by another instrument. Another form ofthe time marker writes with ink on continuous paper. Maker, Cambridge ScientificInstrument Company, England. The Deprez signal or time marker, represented in fig. 11, has very small electro-magnets, and the parts are very light. When connected with a tuning fork inter-rupting the current 200 or more times a second, it will give a good tracing. Maker,Cambridge Scientific Instrument Company, England. MAREYg TAMBOUR. This is the original pattern of Mareys tambour (fig. 12). The tambour slides up anddown a rod R, fastened to a srnall firm iron stand. An india-rubber membrane, B,is tied over the shallow brass vessel F, making an air-tight inclosure. An alu
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