Arizona republican., 1910-11-06

two the lateral balance. The action
 promptly restores the machiAe to it's normal position. A gust of wind for example. may incline the front of the aeroplane downward, but the prompt closing of the electric current tips the rear wings forward. and equilibrium is recovered.
 The new beginning of life on an iso- lated island is eagerly watched by naturalists, and now the SelbOrne sO- ciety has been able to study the new flora of a building site near the cen ter of London. The lot was cleared about two years ago. Since then twen- ty-eight species of Towering plants and ferns have established themselves on it, and mOsses. liverwOrt and other simple plants have appeared. Besides plants commonly distributed by the wind. the bracken, a fern difficult to transplant. has sprung up, presenting q new problem for bOtanists.
 A novel use has been found for the
 famous speech records Of the Vienna Academy of Sciences. This great col lection of phOnograms was designed to preserve the spoken languages of all
 lands. with the idioms and variations of dialect. but on magnifying sections of the records 1000 times, additional
 value was brought out in new light on the theary of sound The A" of the
 human voice was shown to be different
 from that of the frogs crOak, while
 new revelations are expected from the
 study of the voice in disease and of
 minute variations of dialect.
 That the method of taking food. as we'll as the food itself. has a great eff feet on the teeth has been pointed out by pr. J. Sim Wallace in a paper to British dentists. Dental cavities result from the action of bacteria that rapidly ] multiply in starch, sugar and other fer | mentable carbohydrates in contact with the teeth, and the dentist may divide l the food into two classes-One tending to leave viscOus and fermentable car | bohydrates about the teeth, and the 1 other acting to brush them away. This | suggests that food may be so chosen | and eaten as to prevent teeth decay | Each meal should have sufficient hard | food to stimulate mastiCation, with its | excellent effect on gums, jaws, teeth | and alimentary canal generally and l should end with some article tending
 to remove the sticky carbohydrates | from teeth and mouth. The pap-feed- | ing Of children is to be condemned. IL | is suggested that for breakfast fish
 bacon. toast. butter, coffee and tea | should take the place of the customary ! milk, pOrridge. bread and marmalade; | and that other meals should have a | large proportion of hard foods
 The new bean described by Aug I Chevalier grows underground to the
 size of q very small pea in a small region Of central Dahomey, western Africa. IL proves to be a species of VOadzela, q genus hitherto represented by only one species. which produces single-seeded underground pods, both pod and seed being edible, and is cul- ,ivated in Brazil and Surinam, as well
 IS over much of Africa. The new
 species has been grown and sold local
 ly under the name of "dOi." The pod
 produced at the root of the plant has
 he form of a small American peanut,
 and has but one or two seeds, usually white. though sometimes black. red or %ariegated They have an agreeable taste