A system of electrotherapeutics as taught by the International correspondence schools, Scranton, . Fig. 42 Fig. 41Schematic Representation of Fig. 39 in front of the center of the cornea at a distance equal to thatbetween the indicator and the center of the cornea at the timeof the exposure. A and B will represent the indicators, andA B the distance between them. The distances of the shadowsof the body above or below the indicators, .4 C and B D in the *In order to understand the relative positions of the shadows belong-ing to the indicators and the foreign body, it should be remembered,t
A system of electrotherapeutics as taught by the International correspondence schools, Scranton, . Fig. 42 Fig. 41Schematic Representation of Fig. 39 in front of the center of the cornea at a distance equal to thatbetween the indicator and the center of the cornea at the timeof the exposure. A and B will represent the indicators, andA B the distance between them. The distances of the shadowsof the body above or below the indicators, .4 C and B D in the *In order to understand the relative positions of the shadows belong-ing to the indicators and the foreign body, it should be remembered,that when a photographic print is taken of a skiagraph the left side ischanged to right and vice versa. 56 ELECTRICITY IN DISEASES OF §18 one case and A E and B F in the other, are marked above andbelow the points of tbe indicators in the vertical section. In thediagram they are below in each case. The line C D shows thedirection of the rays at the first exposure, and E F the directionof rays at the second exposure. The intersection of these linesmarks the site of the foreign body with reference to
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