. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. t. Triangles erected on a common base, and twotriangles of the same dimensions cut from colonelpaper. Jn addition to its value as a means ofstudying plates, the stereoscope is appre-ciated by the visiting physicians andhospital stall members, who like to havepointed out to them the important patho-logical findings. In order to do this withease, it is practically necessary that bothdemonstrate and the person to whom theplau-s are being demonstrated view simul-taneously the stereoscopic is possibl
. The American journal of roentgenology, radium therapy and nuclear medicine . Fig. t. Triangles erected on a common base, and twotriangles of the same dimensions cut from colonelpaper. Jn addition to its value as a means ofstudying plates, the stereoscope is appre-ciated by the visiting physicians andhospital stall members, who like to havepointed out to them the important patho-logical findings. In order to do this withease, it is practically necessary that bothdemonstrate and the person to whom theplau-s are being demonstrated view simul-taneously the stereoscopic is possible with the modified Wheat-stone instrument, b\ placing a reversedpair of mirrors above the usual pair; butby this method one person sees the imagein false stein 1. It is the purpose of this paper to describea new type of stereoscope and to setforth its particular advantages over thet \ pes now in Fig. 2. Paper triangle superimposed on triangle of samedimensions and then folded, the line along the foldforming the plane of one mirror. If the usual type of illuminating box isused, in which the fronts of opal glass areperpendicular to the support table, thehorizontal mirrors can be placed midwaybetween the boxes. The distance from themirrors to each box should be 2 or 3 than the usual plate-target distanceemployed. If it be desired to incline the fronts ofthe illuminating boxes so that plates canbe leaned upon them, it will be necessaryto employ exact measurement of anglesand distances; and the following proce-dure is recommended: Using any suitable scale, erect a per-pendicular at the mid-point of a basalline 18 in. in length. Now constructtwo acute-angled scalene triangles uponthis line as a common base so that theirapices are 24 in. from the point atwhich the perpendicular bisects the base, -4^ The Van Zwaluwenburg Type of Stereoscope 43 and is in. from the perpendicula
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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1900, bookyear1906
