Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect eightlecturesons00wall Year: 1903 APPENDIX 157 one or other of the two galvanometers ; and once established, we may, if desired further, shunt both galvanometers, so as to reduce both deflections in the same proportion. For this reduction, the common shunt is to be connected with the terminals on each side of plug No. i. ,SL FlG. 58.—Galvanograph. The most convenient arrangement of the two galvanometers is shown in Fig. 58, in which Gx is the indicator and G2 the recorder, The two galvanometers are
Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect eightlecturesons00wall Year: 1903 APPENDIX 157 one or other of the two galvanometers ; and once established, we may, if desired further, shunt both galvanometers, so as to reduce both deflections in the same proportion. For this reduction, the common shunt is to be connected with the terminals on each side of plug No. i. ,SL FlG. 58.—Galvanograph. The most convenient arrangement of the two galvanometers is shown in Fig. 58, in which Gx is the indicator and G2 the recorder, The two galvanometers are controlled simultaneously by plug No. i, separately and individually by plugs No. 5 and 6 of a secondary key- board. We are therefore able to adjust compensation and make any necessary preliminary adjustments with the photographing galvanometer short-circuited at No. 6, and therefore undisturbed by manipulations in the remainder of circuit, where we are guided by the indicating galvanometer. For an observation of any duration, both galvanometers are in circuit and simultaneously controlled by plug No. i, and the general progress of a record on G2 in the dark room, can be followed on the scale of G: placed in front of the work- table. The accessory apparatus, containing the sensitive plate, consists in a box, -| metre in height, which carries the scale, and the horizontal slit, \ mm. in width, upon its anterior surface. The plate, which is
Size: 1347px × 1485px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
