To describe the old apparatus is also to describe to be that too many so-called draughtsmen think that blocks selected from among a collection of ten, upon the art begins and ends in handlinga drawing pen the modern one, and we cannot do better than to pass which are inscribed the first nine… … Fig. 1—GUYOT'S MAGNETIC MAGNIFYING GLASS. one end, for which the experimenter always sub- that he goes at this work well trained in the stitutes another tube, C’, of identical appearance principles and fundamental laws of mechanics, Nos. land 2. The instrument. magnets, and containing the…
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