test plate (testplat)

1. A gla plate with a band, or usually a series of bands, of very finely ruled lines, used in testing the resolving power of microscopic objectives, particularly of high powers. The best known are those ruled by Nobert (hence called Nobert's plates ); one of these, the 19band plate, has a series of 19 bands, ruled at rates varying from 11,300 to 112,000 lines to the inch. The finest band of another plate is ruled at the rate of about 200,000 lines to the inch. Möller's test-plate has a series of 20 or more test diatom-frustules with very fine striations, in some cases running up to nearly 100,000 per inch. testudo All the cranial bones are united by sutures, excepting the articulation of the lower jaw. The pelvis consists as usual of ilium, ischium, and pubis, but it has a peculiar shape, and is generally discrete from the sacrum. The penis is single and intra cloacal, and the anus is a longitudinal cleft. Also called Chelonia. See also cuts under Aspidonectes, carapace, Chelonia, Chelonidæ, leatherback, plastron, Pleu rospondylia, Pyxis, slider, terrapin, and Testudo, 4. 2. In a restricted sense, one of three suborders of Chelonia, contrasted with Athecæ and Triony choidea, and containing the whole of the order excepting the Sphargididæ and the Trionychidæ. testudinate (tes-tū'di-nāt), a. and n. [L. testu dinatus, 2. In ceram., a piece of pottery upon which the vitrifiable colors are tried before being used on the pieces to be decorated, usually a plate with the different colors painted on its rim. test-pump (test'pump), n. A force-pump used for testing the strength or tightne of metal cylinders, etc. It has a pre ure-gage attached to its discharge-pipe, means for connecting the latter with the testudinated (tes-tü'di-nā-ted), a. [ nate +-ed2.] Same as testudinate, 1. +-al.] Same as testudinal. ing regurgitation through the discharge-pipe, and genertestudineal (tes-tu-din'ē-al), a. [