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"After Murkison left us me and Andy sat a while prepondering over our silent meditations and heresies of reason. In our idle hours we always improved our higher selves by ratiocination and mental thought. "'Jeff, says Andy after a long time, 'quite unseldom I have seen fit to impugn your molars when you have been chewing the rag with me about your conscientious way of doing business.
I could never have believed we should have been so deceived. How you managed to disguise your voice I can't think, and to make yourself look so awful. You are as white as a clown; and your teeth, Nan! What has become of your teeth?" "Covered them with black sticking-plaster, that's all. Not even for your benefit, my dears, could I extract my two front molars.
The enamel in the molar teeth is arranged differently in the two species. By an admirable provision, new teeth constantly come up at the part where in man the wisdom teeth appear, and these push the others along, and out at the front end of the jaws, thus keeping the molars sound by renewal, till the animal attains a very great age.
The two small bicuspid "pre-molars" and the three large molars follow these on each side in each jaw. It is "quadri-tuberculate." In 60 per cent. of European lower jaws this is the case. But in 40 per cent. this tooth is quadri-tuberculate. In Polynesians, Chinese, Melanesians and negroes five tubercles are found on this tooth in 90 per cent. of the jaws examined.
After music I made up the fire and parched an ear of maize for my dinner, and while laboriously crunching the dry hard grain I thanked Heaven for having bestowed on me such good molars.
In the lower jaw he has no incisors at all; canine teeth are entirely wanting; and by way of dental apparatus, this meagerly-furnished mouth possesses on each side of either jaw one or two molars, enormous in size, but not of ivory.
You would think the man had pretty good molars that should gnaw a spike like a stick of candy, but a bottle of innocent-looking hydrogen-gas will chew up a piece of bar-iron as though it were some favorite Cavendish. The prominent lesson of science to men, therefore, is faith in the intangible and invisible. Shall we talk of matter as the great reality of the world, the prominent substance?
Since the molar farthest back in each jaw is usually not cut until maturity, it is called a wisdom tooth. The molars are known as the superadded permanent teeth because they do not take the place of milk teeth, but form farther back as the jaw grows in length. Its structure adapts it to a variety of movements.
The apes are characterised by five tubercles on this tooth, and they are found also on the first lower molars of prehistoric men. Four tubercles only on this tooth is a departure from the ape's condition and is found more frequently in Europeans. If these drawings are compared with those in Pl.
Then, at average intervals of about three months, the other incisors and the canines appear and, last of all, the molars, so that at about two years of age we have a complete set of twenty teeth. These are called the milk teeth.
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