It was as if for days he had been staring at a blank sheet, and now a dark slide had been suddenly taken from the magic lantern.
"Close the dark slide now, Steve," whispered Mr. Mainwaring.
Old stereoscopic camera, with mechanical arrangement for transferring plates to and from the dark slide.
So—here he shut the dark slide of his lantern—now to the outside.
When we have entered it into the dark slide and camera, and then exposed to light, the change I mentioned has taken place.
Cleaning board, dark slide, and printing-frame, were all curved.
The ordinary camera may be used, but a carrier to take lantern plates must be used in the dark slide.
I myself took the plate from the dark slide, and, under the eyes of the two detectives, placed it in the developing dish.
From the satchel that I had put beneath the tripod I took out a dark slide and inserted it in the camera, drawing the shutter.
Mr. Billing had slipped his dark slide into his pocket, and was unscrewing his camera from its stand.