Collier's New Encyclopedia

A complete general encyclopedia of 1921 — the world as it was understood just after the Great War, from Aachen to Zwingli, across twelve volumes and six thousand pages.

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Terutero

in ornithology, Vanellus cayennensis; the Cayenne sandpiper of Latham, described by Azara. It is very common in parts of South America.

It approaches the European lapwing in its size, its tuft, and in the general tone of its colors; but it stands higher, and is armed with a spur at the folds of the wing. Its eggs, which are often deposited on the bare ground in October or November, are four or fewer, of a clear olive color marbled with black, and are esteemed a delicacy, like those of the plover in England.

TESTING CLAUSE 316 which the deed consists, the names and designations of the witnesses, the name and designation of the person who penned the deed, and the date and place of signing.

TESTING MACHINES, machines used for the accurate testing of iron, steel and other materials used in constructive work. The problem which these machines are intended to solve is the adjustment with certainty of a safe margin of strength with a minimum of weight, which can be determined only by experimental tests on full sized sections of the materials used in the construction.

One method is to use machines designed to test small sample pieces under such conditions that the breaking strength of the test-piece is measured by the machine, and from the figures thus obtained is calculated the strength per square inch of the full-sized constructive material.

A common feature of such machines is the common steelyard balance, supported by knife edges. There are several machines of this class, some of them built up to 100,000 pounds capacity and over.

The hydraulic testing machine, invented by A. H. Emery , was originally used at the United States arsenal at Watertown, Mass. The greatest peculiarity of the Emery testing machine is the method by which the stress produced on the piece tested is conveyed to the scale and accurately weighed by mechanism that is entirely without friction, and hence rethe same increment of load regardless of the amount of strain on the specimen. This result is accomplished by receiving the load against a flat closed cylinder called the hydraulic weighing head. One of the government experiing by tension of a forged iron link 5 inches in diameter between the eyes, at a strain of 722,800 pounds, and immediately after a horse-hair - - of an inch ments with this machine was the break- 7 1000 in diameter was slowly strained, and, after stretching 30 per cent., snapped under the recorded strain of 16 ounces.

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