all am and a

[Called after Dr. Frederick Allemand, a profe or of Natural History in Leyden University, and a correspondent of Linnæus.] A genus of plants belonging to the order Apocynaceæ, or Dogbanes. The A. cathartic a is, as its name implies, cathartic. In moderate doses it is useful in such diseases as painter's colic, but given in exce it is violently emetic and purgative. (Lindley: Veg. Kingd., 1847, p. 600.) IMG:content-0391.png:[blocks in formation] It Min.: According to the British Museum Catalogue, a variety of Orthite; but Dana considers it a distinct species. He places it in his Epidote group of Uni silicates. is monoclinic and isomorphous with epidote. Its crystals are sometimes tabular and flat, at others long and slender, or even acicular. The hardne is 5.5-6, the sp. grav. 30 to 4.2. It is generally of a pitch brown or black colour, with a sub-metallic pitchy or resinous lustre. It is akin to epidote, and is a cerium epidote. It contains the other rare metals lanthanum, didymium, yttrium, and sometimes glucinium. Dana divides it into seven varieties: (1) Allanite proper, including Cerine, Buck lan dite, and Tantalite ; (2) Uralorthite, (3) Bag ratio nite, (4) Orthite, (5) Xanthorthite, (6) Pyrorthite, and (7) Erdmannite. It is found in Green land, Norway, and other places. al-lan-to-ic, a. [Eng. allantois; ic.] Belonging to the allantois; pertaining to the allantois.