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Gilbert light experiments for boys (1920)

Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 64

An illustration from Gilbert light experiments for boys, 1920, leaf 64
behold, there is an Fig. 90. The Egyptian head GILBERT LIGHT EXPERIMENTS 61 CURTAINS … PLAN Egyptian head in thebox. The hypnotiststands near the audi-ence and addressesthe head. O an-cient Sphinx, awake!Awake! Awake IThe sphinx slowlyopens its eyes andstares straight ahead.The hypnotist thenaddresses questionsto it and it answersin very deep and verydead tones, and so on.Finally the…

Light · Scientific recreations

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