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NEWTON & CO., Opticians to the Royal Family,
NEWTON’S PATENT
TRIPLE ROTATING ELECTRIC LANTERN.
The above plan shows the general arrangement of the Triple Rotating Lantern shown in elevation on page 63, Fig. 8434.
There are three fronts, each carrying an optical system, placed at angles of 120 degrees to each other, and the rotating movement brings up each as desired in front of the fixed light
One of these fronts is fitted with a 4£-in. double condenser for parallel beam work, and with diaphragm and slit fronts.
A second front carries also a 4J-in. condenser with slide stage and double achromatic objective for exhibiting ordinary slides and diagrams, or if preferred the suspended front shown in Fig. 8436, page 66, can be supplied instead for 42s. extra.
Either of these fronts will carry, if desired, a polariscope, a Wright’s optical front, No. 8494, page 71, a small parallel-beam nozzle, No, 8522, page 72, or a vertical attach¬ ment, No. 8450, page 68.
The third front is fitted with Wright and Newton’s patent electric microscope and micro-polariscope mentioned on page 61, No. 8431.
All the fronts are detachable and interchangeable, and any other apparatus that is desired can be used in place of them.
This form of lantern has already been supplied to The Royal Society, The Royal Institu¬ tion, The Royal Dublin Society, The Santa Clara College, California, St. Louis University, The McGill University, Montreal, The Government School of Practical Science, Toronto, The Leland Stanford, Junr., University, Cambridge University, Edinburgh University, Glasgow University, Trinity College, Dublin, Queen’s College, Galway, The Royal Infirmary, Glasgow, The Government Electrical Engineering College, Chatham, The Indian Government, The Uni¬ versity of Havana, Manchester Municipal School of Technology, The Education Department, Toronto, Canada, Sir David Salomons, Bart., Sir Andrew Noble, C.B., Lord Armstrong, the.
Of this Lantern Mr. Lewis Wright, in his “ Optical Projection,” says : “ This form of Lantern is the most complete, convenient, and powerful instrument for scientific demon¬ stration with which I am acquainted.” ,
Mr. T. C. Hepworth, the author of the “Book of the Lantern,” says: “This lantern presents the most complete and perfect projection apparatus ever devised, and is designed principally for use in Science Schools and Colleges. One feels inclined to envy the teacher who has this cylindrical lantern at his elbow with which to illustrate his remarks.” _ jn ....
Note. — The lantern can if necessary be used with the lime light.