Archive image from page 903 of Das mikroskop Theorie, gebrauch, geschichte. Das mikroskop. Theorie, gebrauch, geschichte und gegenwärtiger zustand desselben dasmikroskoptheo00hart Year: 1859 894 Welcker's Mikrometer. Auf dem nämliche Principe beruhend, aber besser, ist das Mikrome- ter von Welcker (Zeitschr. f. rat. Med. Bd. 10, Hft. 1), welches Fig. 391 Fig. 391. Welcker's Mikrometer. IL

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