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tion. Shak. A few may complain without reason; but there is occasion for redress when the cry is universal. Davenant.

number of rays, forming a hollow cone. This occurs when a ray of light is passed through crystals of some substances, under certain circumstances. Conical refraction is of two kinds; external conical refraction, in which the ray issues from the crystal in the form of a cone, the vertex of which is at the point of emer…

A colorless crystalline substance of the phenol series, obtained by melting certain resins, as galbanum, asafetida, etc., with caustic potash. It is also produced artificially and used in making certain dyestuffs, as phthaleïn, fluoresceïn, and eosin.

Giving rest; freeing from toil, trouble, etc. Tired with all these, for restful death I cry. Shak. -- Rest"ful*ly, adv. -- Rest"ful*ness, n.

uncil or deliberative assembly; a resolve; a decree. Then of their session ended they bid cry With trumpet's regal sound the great result. Milton.

A white crystalline hydrocarbon, polymeric with benzene. It is extracted from pine tar, and is also found in certain fossil resins.

A white crystalline hydrocarbon produced indirectly from retene.

Minute transparent, often needlle-shaped, crystals found in the tissues of plants. [Written also raphides.]

Pertaining to, or designating, a colorless crystalline substance (called rhodizonic acid, and carboxylic acid) obtained from potassium carboxide and from certain quinones. It forms brilliant red, yellow, and purple salts.

Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite.

Manganese spar, or silicate of manganese, a mineral occuring crystallised and in rose-red masses. It is often used as an ornamental stone.

on and scalenohedron. Rhombohedral iron ore (Min.) See Hematite. -- Rhombohedral system (Crystallog.), a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc.

ining to, or designating, an isomeric modification of ricinoleic acid obtained as a white crystalline solid.

The glycerin salt of ricinelaidic acid, obtained as a white crystalline waxy substance by treating castor oil with nitrous acid.

A bitter white crystalline alkaloid extracted from the seeds of the castor-oil plant.

any extended elevation between valleys. "The frozen ridges of the Alps." Shak. Part rise crystal wall, or ridge direct. Milton.

To cry with a full, loud, continued sound. Specifically:

s found in archil (Roccella tinctoria, etc.), and other lichens, and extracted as a white crystalline substance C17H32O4.

powders. -- Rochelle salt (Chem.), the double tartrate of sodium and potassium, a white crystalline substance. It has a cooling, saline, slightly bitter taste and is employed as a mild purgative. It was discovered by Seignette, an apothecary of Rochelle, and is called also Seignete's salt.

A tank in which alum is crystallized from a solution.