Orr's Circle of the Sciences: Organic nature, v.1] The principles of physiology
William Somerville Orr
W.S. Orr and Company, 1854 - Science
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animals appears arch articulated attached base become birds blood body bones called cavity centrum character chief close common compared complete consists contain continued corresponding dentine developed direction distinct divisions elements equal exists expanded extends extremity fishes forwards four functions give greater hæmal hand head human important islands kind knowledge language larynx length less limbs lower matter maxillary means membrane middle modifications molar mouth muscles nature neural organs origin outer pair Persian plates populations portion position posterior present produced progress proper proportion relation remarkable respect rest retained ribs segment short side single skeleton skull sometimes sound species spine structure substance surface teeth termed third tissue toes tooth transverse tribes true trunk Ugrian upper usually vertebræ voice whole
Page 200 - It is true that the serpent has no limbs, yet it can outclimb the monkey, outswim the fish, outleap the jerboa, and, suddenly loosing the close coils of its crouching spiral, it can spring into the air and seize the bird upon the wing: all these creatures have been observed to fall its prey.
Page 34 - Again, the mathematical postulate that things which are equal to the same are equal to one another, is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Page 303 - ... as is also that tooth in the lower jaw which, in opposing it, passes in front of its crown when the mouth is closed. The other teeth of the first set are the ' deciduous molars ; ' the teeth which displace and succeed them vertically are the ' premolars ; ' the more posterior teeth, which are not displaced by vertical successors, are the ' molars,
Page 34 - ... truth of a proposition postulated, by showing that the deductions from it are true, requires that the truth of the deductions shall be shown in some way that does not directly or indirectly assume the truth of the proposition postulated. If, setting out with the axioms of Euclid, we deduce the truths that " the angle in a semicircle is a right angle...
Page 312 - Beyond these two islands lies the sea of Andaman ; the people on this coast eat human flesh quite raw; their complexion is black, their hair frizzled, their countenance and eyes frightful, their feet are very large, and almost a cubit in length, and they go quite naked.
Page 266 - ... instruments for uprooting or cutting down trees, or for transport and working of building materials ; they are characteristic of age and sex ; and in man they have secondary relations subservient to beauty and to speech. Teeth are always intimately related to the food and habits of the animal, and are therefore highly interesting to the physiologist : they form for the same reason important guides to the naturalist in the classification of animals...
Page 200 - ... fall its prey. The serpent has neither hands nor talons, yet it can outwrestle the athlete, and crush the tiger in the embrace of its ponderous overlapping folds.
Page 319 - Besides these cars they have a superior kind of vehicle upon two wheels, covered likewise with black felt, and so effectually as to protect those within it from wet, during a whole day of rain.
Page 188 - ... to the bottom ; if the right pectoral fin only be cut off, the fish leans to that side ; if the ventral fin on...
Page 211 - Those who have witnessed the shock given to the head of a crocodile by the act of snapping together its thin long jaws, must have seen how liable to fracture the lower jaw would be, were it composed of one bone only on each side.