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 . Fig. 68.—A periodic horizontal galvanometer. (Hirschraaan.) The instrument is represented one-third its real size. This is a direct-readinginstrument, it being possible to measure a current to one one-hundredth of a milli-amp^re. In order to have a vertical reading, a mirror, B, is used. The lever S arreststhe needle, which is brought to the zero point of the scale. The wir
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 . Fig. 68.—A periodic horizontal galvanometer. (Hirschraaan.) The instrument is represented one-third its real size. This is a direct-readinginstrument, it being possible to measure a current to one one-hundredth of a milli-amp^re. In order to have a vertical reading, a mirror, B, is used. The lever S arreststhe needle, which is brought to the zero point of the scale. The wires for conduct-ing the current are fastened in the clamps E E. Maker: Hirachmann, Fro. 6!).—Westons standard direct-reading mil-am-meter. Fig. 69 represents a convenient form of instrument for measuring delicate has a scale of double values with ratio of 50. Each division on upper scale valuesis 5 milliamperes; each division on the lower scale values is one-tenth milliampfere,readable to one one-hundredth. A change from one scale to the other is made bychanging the connection on the left of the instrument from one binding post to theother. Maker: Weston Electric Instrument Company, Newark, N. J. 204 MAN AND ABNORMAL MAN. THE FARADIMETEU. TIic two in>striimeutB just luuiitioned laeasnio the !;;ilv;xuic or direct current instrument lielow (fig. 70) is a fariidiuieter and measures the Jaradic or indirectcurrent. This form of the instrument is transportable. The case whicli covers it is12 centimeters wide, 20 centimeters long, and 29 centimeters high. When in use itis laid on the tahle, as shown in tiro drawing. The induction ai)paratus P S is
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashingtongovtprin
