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ernal depression. -- Pit saw (Mech.), a saw worked by two men, one of whom stands on the log and the other beneath it. The place of the latter is often in a pit, whence the name. -- Pit viper (Zoöl.), any viperine snake having a deep pit on each side of the snout. The rattlesnake and copperhead are examples. -- Work…

particular. You are rather point-devise in your accouterments. Shak. Thus he grew up, in logic point-devise, Perfect in grammar, and in rhetoric nice. Longfellow.

lights, the aurora borealis or australis. -- Polar, or Polaric, opposition or contrast (Logic), an opposition or contrast made by the existence of two opposite conceptions which are the extremes in a species, as white and black in colors; hence, as great an opposition or contrast as possible. -- Polar projection. Se…

is large enough to serve as a covered walk. See also Carriage porch, under Carriage, and Loggia. The graceless Helen in the porch I spied Of Vesta's temple. Dryden.

Cutting off; (Logic) exactly limiting by cutting off all that is not absolutely relative to the purpose; as, precisive censure; precisive abstraction. I. Watts.

One of the five most general relations of attributes involved in logical arrangements, namely, genus, species, difference, property, and accident.

s are alike. The canoe is long and narrow, and is kept from overturning by a cigar-shaped log attached to a frame extending several feet to windward. It has been called the flying proa, and is the swiftest sailing craft known.

as, proportional quantities; momentum is proportional to quantity of matter. Proportional logarithms, logistic logarithms. See under Logistic. -- Proportional scale, a scale on which are marked parts proportional to the logarithms of the natural numbers; a logarithmic scale. -- Proportional scales, compasses, divider…

addition to the human body of some artificial part, to replace one that is wanting, as a log or an eye; -- called also prothesis.

A syllogism preliminary or logically essential to another syllogism; the conclusion of such a syllogism, which becomes a premise of the following syllogism.

n this act shall prejudice the rights of any person whatever. Provided the deductions are logical, they seem almost indifferent to their truth. G. H. Lewes.

Of or pertaining to psychology. See Note under Psychic. -- Psy`cho*log"ic*al*ly, adv.

more desirous to get rid of Episcopacy than to prove themselves consummate publicists and logicians. Macaulay.

A split log or heavy slab with the face smoothed; as, a floor made of puncheons. [U.S.] Bartlett.

To saw (a log) into quarters; specif., to saw into quarters and then into boards, as by cutting alternately from each face of a quarter, to secure lumber that will warp relatively little or show the grain advantageously.

tal number of any system; a base. Thus, 10 is the radix, or base, of the common system of logarithms, and also of the decimal system of numeration.

A collection of logs, boards, pieces of timber, or the like, fastened, together, either for their own collective conveyance on the water, or to serve as a support in conveying other things; a float.

To find by logical process; to explain or justify by reason or argument; -- usually with out; as, to reason out the causes of the librations of the moon.

One who reasons or argues; as, a fair reasoner; a close reasoner; a logical reasoner.

ntity. -- Reciprocal figures (Geom.), two figures of the same kind (as triangles, parallelograms, prisms, etc.), so related that two sides of the one form the extremes of a proportion of which the means are the two corresponding sides of the other; in general, two figures so related that the first corresponds in some…