The boy's own book of indoor games and recreations : a popular encyclopædia for boys (1890)
Stables, Gordon, 1840-1910, Hutchison, George Andrew, 1841-1913 · Philadelphia : J.B. Lippincott · leaf 225
e. This aperture is called the slide-holder. We may separate magic-lanterns into three great divisions, the distinguish-ing difference between them being the kind of light employed. In the first divisionthe lamps are constructed to burn colza or sperm oil; in the second division amineral oil… … Fig. I. First, then, let us deal with the lanterns illuminated by a lamp burning colza orsperm oil. Of these lanterns there are two subdivisions, those whose condensinglenses are of a size suitable for exhibiting the standard slides (slides three and a quarter inches in diameter), called…
Games · Amusements
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