Transactions of the American Microscopical Society, Volumen 31American Microscopical Society, 1912 |
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acervuli acetabulum American Microscopical Society animal apparatus arc lamp ascogenous stage bladder flukes Buffalo cankers carbons cell walls characters chitin cilia Colletotrichum colony color conidia conidiophores connected cross section cytosome fibrils Darwin Decatur described diameter disease Distomum dorsal drawing surface ducts eggs figure fish flame cells frog fungi fungus genera genus Gloeosporium Gonium Gorgodera amplicava Gorgodera minima Gorgoderina attenuata hyaline insect lake Lake Louise Lebertia light Looss mass Melanconiales method mirror muscle Myxosporium nucleolus nucleus Ohio optical oral sucker organ ovary parasites Ph.D photographs pineal body plants plastids Plate posterior produced PROF protoplasm pycnidia pyrenoids Rana reproductive rheostat seminal vesicle side slide species specimens spores spots staining structure substage condenser text figure thickness thru tion tissue Transactions tube tumor twigs uterus vegetative ventral vesicle width yolk glands Zool
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Página 33 - 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.
Página 32 - History warns us, however, that it is the customary fate of new truths to begin as heresies and to end as superstitions...
Página 224 - Jan. i, at which time the annual election of officers will take place. The place of the business meeting has not yet been determined.
Página 33 - 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
Página 276 - ... 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...
Página 288 - NEW HAMPSHIRE STATE LIBRARY Concord, NH NEW YORK ACADEMY OF MEDICINE 17 W. Forty-third St, New York City NEW YORK PUBLIC LIBRARY 476 Fifth Ave., New York City NEW YORK STATE LIBRARY Serial Section, Albany, NY NORTHWESTERN COLLEGE LIBRARY Naperville, 111.
Página 162 - ... kernels off cleanly down to the cob. While this caterpillar may occasionally feed in the crown of the corn plant, especially when the corn is small, nevertheless, it completely consumes the foliage, which is altogether different from the injury done by the European corn borer. The full-grown caterpillar is from two and one-half to three times as large as the caterpillar of the European corn borer. The Mexican bean beetle" is extending its range farther and farther northward each year.
Página 254 - ... manner the central portion becomes sunken, and between the paler central portion and the brown outer border a band of red or redpurple is apparent. The unaffected portion of the berry remains perfectly green, but the spot may at times embrace eventually the entire berry. When the shoots are affected the spots are similar to those on the fruit except that they elongate in the direction of the axis, becoming prominently sunken, pale at the center, and FIG. 159. GLIEOSPORIUM AMFELOPHAC,UM: ANTHRACNOSE...
Página 190 - Fig. 7. Photograph of the author's apparatus for drawing with the microscope without an ocular or substage condenser. The arc lamp is Mr. Albert T. Thompson's automatic lamp for direct current. It can be used on small currents, and up to 25 amperes. This is the first automatic arc lamp for right angled carbons. By means of the optical bench carrying all the apparatus, the different parts are pulled forward so that the microscope tube and mirror project over the drawing shelf. This is adjustable up...
Página 208 - ... 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...