Transactions of the American Microscopical Society, เล่มที่ 31American Microscopical Society, 1912 |
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abundant acervuli acetabulum adult American Microscopical Society animal apparatus arc lamp ascogenous stage bladder flukes blood cankers carbons cell walls characters chitin chromosomes cilia Colletotrichum colony color conidia conidiophores connected cross section cytosome fibrils Darwin described diameter disease Distomum division dorsal drawing surface eggs fact figure fish flame cells frog fungus genera genus Gloeosporium Gonium Gorgodera minima Gorgoderina attenuata growth Gunsight hyaline insects Lake Louise leaflets Lebertia light mass mature method microtome mirror nature nucleolus nucleus objects Ohio optical organ ovary parasites Ph.D photographs pineal body plants plastids Plate posterior present produced PROF protoplasm pycnidia pycnidial cavity pyrenoids Rana rheostat seminal vesicle side slide species specimens spines Spirogyra spores spots structure student substage condenser sucker text figure thickness thru tion tissue tube tumor twigs uterus variations vegetative ventral vesicle Zool
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หน้า 30 - History warns us, however, that it is the customary fate of new truths to begin as heresies and to end as superstitions ; and, as matters now stand, it is hardly rash to anticipate that, in another twenty years, the new generation, educated under the influences of the present day, will be in danger of accepting the main doctrines of the
หน้า 31 - Origin of Species," with as little reflection, and it may be with as little justification, as so many of our contemporaries, twenty years ago, rejected them. Against any such a consummation let us all devoutly pray; for the scientific spirit is of more value than its products, and irrationally held truths may be more harmful than reasoned errors.
หน้า 190 - EXPLANATION OF PLATES Plate XIX Fig. 2. Photograph of the author's drawing outfit, for the house lighting system, arranged for evening or dark room drawing, sw. Separable plug and wires connecting the house lighting system with the arc lamp. r. Rheostat in series (ie in one wire). It does not allow more than 5 to 6 amperes of current to flow. 1. Arc lamp with small carbons at right angles. There is a black disc at the end of the lamp-condenser tube to aid in getting the light through the microscope....
หน้า 31 - It tells us that whenever a doctrine claims our assent we should reply, Take it if you can compel it. The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking, and its right to exist is coextensive with its power of resisting extinction by its rivals. From this point of view, it appears to me that it would be but a poor way of celebrating the Coming of Age of the
หน้า 272 - ... forester had been associated with Mr. Olmsted in the Biltmore, NC work. You would have understood what I was after when I began systematically to thin out these nurses. The public, the Commissioners, could not . . . I am inclined, for the reason thus illustrated, to advise you to take the position. ... I am inclined to think that it would be an advantage to you professionally. Particularly so if you should be able to make it manifest that you recognize clearly that the proper management of public...
หน้า 204 - ... cells of adult Crepidulas there is no marked increase of cytoplasm over nucleus, as compared with the blastomeres. The Kernplasma-Relation of various adult epithelial cells, not filled with metabolic products, varies from 28 to 7; in oocytes and ganglion cells it varies from 6 to 3 (pp. 25-28). 6. The size of the nucleus is dependent upon at least three factors: (a) The initial quantity of chromatin (Boveri); (b) The volume of the cytoplasm ; (c) The length of the resting period (p. 25). 7. The...
หน้า 136 - June n, 1911, at the home of his sister. The cause of his death was gradual weakening of the heart. He was born March 8, 1836, in Cincinnati, Ohio, where his father was a business man who came to this country from Scotland in 1830. He prepared for college under Charles Mathews, principal of a private school in Cincinnati, but on account of ill health did not enter Yale until the third term of Freshman year. During Sophomore year he was largely instrumental in obtaining the first gymnasium, on Library...
หน้า 125 - ... student with the microscope, as well. Insect Pests of Farm, Garden and Orchard. E. Dwight Sanderson, Dean of College of Agriculture, W. Va. Univ.; 684 pages, 513 illustrations. New York; John Wiley and Sons, 1912. Price, $300 (12/6) net. INDEXING AND FILING METHODS FOR THE MICROSCOPIST Text : — The next best thing to knowing a thing is to know where it can be found when wanted. Application of the above text by an amateur Microscopist : i. Filing Brief Articles. The amateur, especially if he...
หน้า 160 - Phila., 5 :205-209. . 1856. A Synopsis of Entozoa and some of their Ectocogeners observed by the author. Proc. Acad. Nat. Sci. Phila., 8:42-58.