We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
36
CONDENSER CELL.
In the lanterns manufactured by Messrs. Colt & Co., of New York, the back condenser is supported on three spring clips, as shown in the illustration; this allows for expansion without injuring the lens. Electric lights
being much used in connection with lanterns,
Ses
the heat given off is much greater than when limelight is employed, hence the greater the | expansion ; and many condensers, which when cold in the circular cells, are loose, have been known to become cell-bound when the electric light has been used, and thus crack. This new device, however, obviates all chances of fracture.
UNIFIED SLIDE BINDER.
Some years ago a Birmingham firm introtroduced slide binders in one piece made of thin copper, but owing to the inconvenience of sharp edges occasioned by the want of the binder
guaprcemersas. lying quite close to the glass m they gradually fell into dismuse. Messrs. Wood Bros., im of Lord Street, Liverpool, m are now issuing binders of fm the same shape, but in this iw instance they are made of i the usual binding paper and gummed ready for use. ‘The binders are of the shape shown in cut, and being without any jointing are easily applied, and when finished the slide presents a neat appearance, especially at the corners.
WORMALDS
UNIFIED
LANTERN SLIDE BINDER
REGISTERED
UNIVERSITY EXTENSION LANTERN.
Adopting the best points suggested from various sources, Messrs. Watson & Sons, of High
The Optical Magic Lantern Journal and Photographic Enlarger.
Holborn, have brought out a new lantern in which is provided a tilting base, and also a convenient form of end door, which unlike those in general use, hinges at the sides, thus forming two doors which meet in the centre. This
style, for many reasons, is preferable to the old form of having the flap in one piece. This lantern is adapted for burners of any kind— oil, limelight, acetylene, or electric:
EASTMAN’S X RAY PAPER.
There being certain disadvantages connected with the use of glass plates, such as breakages, and want of their conforming to the part to be radiographed, the Eastman Photographic Materials Company, Limited, have introduced a paper which is admirably adapted for the purpose. With it positives are made direct; thus bones appear white, and as the paper is transparent to the X rays, several positives of any one object may be taken at one operation by merely placing the desired number of sheets together. This paper is extremely sensitive, and there being practically no limit to its size, as far as the sensitive surface is concerned, it would take in the whole length of the human body. The paper after having been fexposed, is