The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

Record Details:

Title:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Date:
1877
Publisher:
Philadelphia, J. A. Moore
Volume:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Leaf #:
000103
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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94 SCIOPTICON MANUAL. EIPPLE WAVES. —Fill the tank, as it rests on the ver- tical lantern, with clear water, when taps on the edge of the glass will start ripple waves, which will be seen on the screen in varied harmonious arrangements of form. Touching the surface with the point of a fine wire will start the waves in circles. Vibrations effected by drawing a fiddle bow across the edge are seen to vary according to the different tones produced. ADHESION FIGURES. —Drops of various oils upon the surface of the water, essential oils for instance, will ex- hibit various interesting adhesion figures, each oil as- suming some peculiar form of outline. MAGNETIC CURVES. —A thin bit of magnetic steel, say three-fourths of an inch long by one-eighth wide, ce- mented on the under side of a glass plate, will attract fine iron filings scattered upon the plate into curves, illustrating the deviation of the magnetic attraction at either pole and the neutral axis in the centre of the magnet. A few taps on the glass will assist the arrange- ment. CHAPTER VIII. CONCERT EXERCISES. THE value of visible illustrations as a means of im- parting instruction, and of affording rational entertain- ment, depends much on the accompanying oral explana- tions.