Identifier: americanaunivers03newy (find matches)
Title: The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world
Year: 1908 (1900s)
Authors:
Subjects: Encyclopedias and dictionaries
Publisher: New York : Scientific American Compiling Dept.
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive

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s. Therecent introduction of the Chinese beetle (Myla-bris cickorii) has done much to remove thism.isconception, for it has been shown that theMylabris is much stronger than Lytta vesica-toria, yielding, according to analysis, fully dou-ble the quantity of cantharidin. Our nativeblister-beetles, when powdered, nearly resemblethe Mylabris in color. Cantharidin (C10H12O4), the vesicatingprinciple of cantharides. The methods of ob-taining it consist in treating the powdered in-sects with a solvent, such as alcohol, ether,or chloroform, the last being preferable. Thesolution is evaporated, and the residue is puri-fied from a green oil which adheres to it obsti-nately, by digesting with bisulphide of carbon orby redissolving in alcohol. Purification is fur-ther affected by animal charcoal, and the can-tharidin is crystallized from hot alcohol or chlo-roform. Canthoplasty (Gr. kanthos, the angle ofthe eye,** and plastikos, formative*), the for-mation by plastic operation of the angle of the
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