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Scientific American, Vol. 60, No. 23 (1889) (1889)

leaf 8

An illustration from Scientific American, Vol. 60, No. 23 (1889), 1889, leaf 8
rovided with mouths of the streets and lanes in the line of the pro- sponds. The length of an open resonant tube is one-half cession were barricaded with double rows of high mat- a revolution counter and with a trumpet-shaped reso- nator. It is designed to be used in the same manner as ting, the… … Fig. 2—SIREN FOR MEASURING eral knowledge.”— Universal Tinker. the character ‘‘ felici- VELOCITIES. ty” painted on them; or +O Oo What are the Thoughts of the Dying ? then came halber- that of the sound wave to which it responds. It is In the Société de Biologie, Feré affirmed that a dyitg diers…

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