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alimentary canal Amceba animals arteries auricle bees birds blood blood-vessels body bones brain branch breathing burrows butterflies called capillaries carbon dioxide cavity cells cephalothorax Class color composed corpuscles covered crabs crayfish digestive diseases dorsal downy woodpecker eggs eyes feathers feed fibers fins fishes flowers frogs germs gills glands habits hair hairy woodpecker hatched heart heat honeybee individuals insects intestine kidneys larvae legs live lungs mammals membrane microscope molluscs mosquito moth mouth muscles muscular nectar nerve nervous system nest Note observation ocean opening organs outer oxygen pair parasites pass plants pollen pond produced proteid protoplasm Protozoa pupae races region reptiles Sacculina shell side skeleton skin snakes species specimens spiders spinal stomach structure substances surface swim tail teeth tiny tissues toad tube veins ventricle vertebral column vertebrates Vorticella wild wings woodpeckers young
Page 353 - ... on the palms of the hands and soles of the feet. The sebaceous glands are considered under Histology of the Hair.
Page 426 - Myrmica, climbed on its back, and repeated the very same performance. Again it took toll and passed on to still another Myrmica. On looking about in the nest I observed that nearly all the Leptothorax workers were similarly employed.
Page 426 - The Myrmicas seem not to resent at all the presence of the Leptothorax guests, and indeed may derive some benefit from the constant cleansing licking of their bodies by the shampooers. But the Leptothorax workers are careful to keep their queen and young in a separate chamber, not accessible to their hosts. This is probably the part of wisdom, as the thoughtless habit of eating any conveniently accessible pupae of another species is wide-spread among ants
Page 171 - The hard-shell clam (Venus mercenaria), or " quohog "as it is often called, is found along the Atlantic coast from Texas to Cape Cod. It is "common on sandy shores, living chiefly on the sandy and muddy plots, just beyond low-water mark. ... It also inhabits estuaries, where it most abounds. It burrows a short distance below the surface, but is frequently found crawling at the surface with the shell partly exposed.
Page 417 - ... and elevating her long ovipositor in a loop over her back, with its tip on the bark of the tree, she makes a derrick out of her body and proceeds with great skill and precision to drill a hole (fig.
Page 366 - Professor David Starr Jordan in the Popular Science Monthly, February, 1898, said: " The healthy mind stands in clear and normal relations with nature. It feels pain as pain. It feels action as pleasure. The drug which conceals pain or gives false pleasure when pleasure does not exist forces a lie upon the nervous system. The drug which disposes to reverie rather than to work, which makes us feel well when we are not well, destroys the sanity of life. All stimulants, narcotics, tonics, which affect...
Page 300 - The cheapest food is that which supplies the most nutriment for the least money. The most economical food is that which is cheapest and at the same time best adapted to the wants of the user. The maxim that "the best is the cheapest
Page 201 - ... toads have done before, it pushes boldly out over the land and away from the water. If one visits the natural pond at about this season (last half of June, first of July) , he is likely to see many of the little fellows hopping away from the water. And so vigorously do they hop along that in a few days they may be as far as a mile from the pond where they were hatched. After a warm shower they are particularly active, and are then most commonly seen. Many think they rained down. " They were not...
Page 47 - ... albuminous substances in lacking nitrogen as a composing element). There are also various salts and gases and always water to be found in living substances. Water is absolutely necessary to the physical condition of half fluidity which gives to protoplasm its essential capacity for motion on itself. The commoner salts found in living substances are compounds of chlorine as well as the carbonates, sulphates, and phosphates of the alkalies and alkali earths, especially common salt (sodium chloride),...