The American Naturalist, Volumen38Essex Institute, 1904 |
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Términos y frases comunes
Abies Amer AMERICAN NATURALIST Amoeba animals antennæ appear Beecher birds blepharoplast bone bordered pits Botanical Bull cell plate cell wall centrosomes centrospheres character chromatophore chromosomes classification cleavage Coniferales Cordaites cysts cytoplasm described division dorsal eggs embryo fact feature female ferns fibers fishes Flora formation fossil genera genus groups Jour kinoplasm Larix later layer leaf male maxillæ ment mitosis Museum nuclear nucleolus nucleus occur Ophioglossum organs pair paper papillæ parenchyma parietal PH.D Pinus plants plasma membrane plastids pleopods posterior present primitive Proc protoplasm published radial region relation represent resin resin cells resin passages sclerites seen segment Sequoia shell shown side species specimens sperm spindle sporangia sporangium spore spore mother-cell stage structure Suborder summer wood surface Taxodium thallophytes tion tissue tracheids Tsuga University vacuoles valve ventral vertebræ zoospores
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Página 660 - Some phases of the work of the Bureau of plant industry of the US department of agriculture.
Página 78 - Meyer, of the Bureau of Plant Industry of the United States Department of Agriculture...
Página 89 - It presents in an inexpensive form, considering its great amount of matter, with freshness, owing to its weekly issue, and with a satisfactory completeness...
Página 233 - ESTABLISHED BY BENJAMIN SILLIMAN IN 1818. The Leading Scientific Journal in the United States Devoted to the Physical and Natural Sciences, with special reference to Physics and Chemistry on the one hand, and to Geology and Mineralogy on the other.
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Página 233 - States ; $6.40 to foreign subscribers of countries in the Postal Union. A few sets on sale of the first, second and third series at reduced prices. Ten-volume index numbers on hand for the second, third and fourth (Vol.
Página 586 - Ferns. A manual for the northeastern states with analytical keys based on the stalks and on the fructification.
Página 845 - The superior surfaces of the femur, tibia, humerus, and fore-arm are of the same color as the back; that of the humerus separated from the green of the jaws by an isthmus of the purplish shade, and that of the tibia separated anteriorly from the saffron of its lower surface by a band of mulberry. The green of the back and extremities is everywhere margined with pure white, except posteriorly on the femur and tibia, and anteriorly on the former, where saffron takes its place.
Página 263 - Kreidl (1896) had performed certain experiments on trout in the fish basins of the Benedictine Monastery at Krems, Austria, where the fish were called up to be fed at the ringing of a bell. He found that the fish appeared just the same if a person went to the customary place without ringing the bell, and that no amount of bell ringing- would bring them if the person remained out of sight. On this account Kreidl concluded...
Página 275 - ... bodies is proportional to the product of their masses divided by the square of the distance between them.