Elements of natural philosophy (Volume 2-3) . 264: NATURAL PHILOSOPHY. Construction oftho image; Means ofadjusting; Method of using. changes the direction of theaxis of a pencil deviated by it,it is obvious that the surface ofthe paper should be image of the object isbrought accurately to the tableX Y\ by means of the tube t v,which admits of a vertical mo-tion in the top of the chamber;this tube also admits of ahorizontal motion, the purposeof which is, to take in differ-ent objects in succession with-out changing the position ofthe body of the instrument. Fig. THE MAGIC LA

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Elements of natural philosophy (Volume 2-3) . 264: NATURAL PHILOSOPHY. Construction oftho image; Means ofadjusting; Method of using. changes the direction of theaxis of a pencil deviated by it,it is obvious that the surface ofthe paper should be image of the object isbrought accurately to the tableX Y\ by means of the tube t v,which admits of a vertical mo-tion in the top of the chamber;this tube also admits of ahorizontal motion, the purposeof which is, to take in differ-ent objects in succession with-out changing the position ofthe body of the instrument. Fig. THE MAGIC LANTERN. Magic lantern; § 89. This consists of a small close chamber, fromone side of which proceeds a tube containing usuallytwo convex lenses A and B, with an intermediate open-ing for a glass slide C, which may be moved freely in Essential parts; a direction at right angles to the common axis of thelenses. Within the chamber is an Argand lamp D, Fi<?. 03. Graphicrepresentation;

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