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eel. The rotation of the wheel brings them rapidly into sight, one after another, and the blended effect gives a semblance of motion.

A dark green aluminous variety of amphibole, or hornblende.

ple tones which in combination form an ordinary tone; the overtones, or harmonics, which, blending with a fundamental tone, cause its special quality of sound, or timbre, or tone color. See, also, Tone.

he passed by as we stood there. -- To pass into, to change by a gradual transmission; to blend or unite with. -- To pass on, to proceed. -- To pass on or upon. (a) To happen to; to come upon; to affect. "So death passed upon all men." Rom. v. 12. "Provided no indirect act pass upon our prayers to define them." Jer.…

The part of a picture where the shade imperceptibly blends with the light.

spectively) are superimposed. Each image is given its own primary color, and these colors blend and reproduce the colors of the object.

A dark green igneous rock, consisting largely of chrysolite, with hornblende, augite, biotite, etc.

Pitchblende.

A supposed new element, a radioactive substance discovered by M. and MMe. Curie in pitchblende. It is closely related chemically to bismuth. It emits only alpha rays and is perhaps identical with radium F.

False galena, or blende. See Blende (a).

ulphide. Hence sable coal his massy couch extends, And stars of gold the sparkling pyrite blends. E. Darwin.

An intensely radioactive metallic element found (combined) in minute quantities in pitchblende, and various other uranium minerals. Symbol, Ra; atomic weight, 226.4. Radium was discovered by M. and Mme. Curie, of Paris, who in 1902 separated compounds of it by a tedious process from pitchblende. Its compounds color fla…

a reticulated sructure. Reticulose rhizopod (Zoöl.), a rhizopod in which the pseudopodia blend together and form irregular meshes.

ic; -- called also ruby sulphur. -- Ruby of zinc (Min.), zinc sulphide; the mineral zinc blende or sphalerite. -- Ruby silver (Min.), red silver. See under Red.

To spread and blend together; to unite; as, colors run in washing. In the middle of a rainbow the colors are . . . distinguished, but near the borders they run into one another. I. Watts.

mitting of ready division into slabs or slates. The common kinds are mica schist, and hornblendic schist, consisting chiefly of quartz with mica or hornblende and often feldspar.

Single; not complex; not infolded or entangled; uncombined; not compounded; not blended with something else; not complicated; as, a simple substance; a simple idea; a simple sound; a simple machine; a simple problem; simple tasks.

ous slate (Min.), a soft species of sectile clay slate, impregnated with bitumen. -- Hornblende slate (Min.), a slaty rock, consisting essentially of hornblende and feldspar, useful for flagging on account of its toughness. -- Slate ax or axe, a mattock with an ax end, used in shaping slates for roofs, and making hol…

- Slaty gneiss (Min.), a variety of gneiss in which the scales of mica or crystals of hornblende, which are usually minute, form thin laminæ, rendering the rock easily cleavable.

Zinc sulphide; -- called also blende, black-jack, false galena, etc. See Blende (a).