numen I Inæ

pl. [Mod. Lat. numen i(us); Lat. fem. pl. adj. suff. -inæ.] Ornith.: Curlews, a sub-family of Scolopacide. Bill arched, the nasal groove reaching to its tip. Optics: The formula by which the illuminating and resolving power of high-power microscopic objectives is now calculated. Since it became cus- tomary to interpose water, oil, or other fluid be tween the object and the lens, it is found that a water-immersion lens of 97%, and an oil-immersion of 82°, give equal results to a dry or air lens of 180°, This obviously depends on the diameter of the back lens of the objective, and this upon the refractive index of the medium between lens and object. It is expre ed by the formula, n sin u , where n is the refractive index of the medium-air or fluid-and u the semi-angle of aperture. It is thus found that an oil-lens of 180° (oil of ref. index 1'52) has an N. A. of 1:52 against 100 for 180° in air. This only represents the comparative diameters of the effect- ive pencils, and the relative illumination is, of course, obtained by squaring the N. A.'s to get the comparative areas of the pencils. We thus find that an oil-lens of 180° gives 2.310 the illumination of a dry objective of 180°. nu-měr-ic-al-lý, adv . [Eng. numerical; -ly.] 1. In a numerical manner; with respect to num- ber or numerical quantity; in numbers; as a quan- tity numerically expre ed; an algebraic expre ion numerically greater than another, . *2. Individually; as, A thing is numerically the same, or numerically different. *nü-mer-Ist, s. [Lat. numer ( us )=number; Eng. suff. -ist .] One who deals with numbers. 1. Many in number; consisting of a great number of individuals or units; not few. "Drawing after it a numerous train of homogeneous consequences." -South : Sermons , vol. v., ser. 2. *2. Containing many; largely attended. "In any numerous school."-Johnson: Lives of the Poets; Milton. Flow'd from their lips in prose or numerous verse." Milton: P. L., v. 150. II. Bot .: (1) So many that they cannot be counted with accuracy; (2) a small, but indefinite number. To make one's self too numerous : To interfere, to offer advice when not wanted. ( Slang .) IMG:content-0157.png:[blocks in formation] nummuline num-mu-line, a. [NUMMULINA.] Resembling a nummulite in structure. năm-mu-lin'-I-da, subst. pl. [Mod. Latin num mulin ( a ); Lat. neut. pl. adj. suff. -ida.] [NUMMULITIDE. năm-mu-lite, subst. [NUMMULITES.] A popular name for any member of the genus Nummulites. năm-mu-li-têş, s. [Lat. nummul(us)=money suff.- ites = -ite ( Palæont.).] Zool. & Palæont .: The typical genus of the family Nummulitide, from Australian and other seas. The shell is thin, lenticular, and like a coin. If a transverse section of it be made, numerous spiral convo lutions are seen, each divided into small chambers, the transverse septa collectively looking like broken radii from the center of the nummulite.