Walsh, David · London : Baillière, Tindall and Cox · leaf 66
ewed with a stereoscope, its construction will be readily seen and understood.The horizontal bar shows the tube-holder displaced to one side, and the clip onthe right side is the limit to which it must be displaced for the second photo-graph. A wire is seen stretched on the nearer end of the box,… … a o h 14 m <) w < u ^ - AH p (3 <1 <j co CN 6 h ELECTRICAL APPARATUS AND METHODS 59 arranged parallel to this wire. This leaves a white line at the edge of eachnegative, and this enables the photographs to be mounted correctly in register.A board is seen below, and upon it will be noted…
X-rays · Radiography
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