NEtTROPTERIS 



NIELLO 



Neuropteris, (nu-rop'ter-is). [Gk. neuron, 

 nerve; pteris, fern.] 

 A coal plant : fronds 

 of tree ferns, found 

 in carboniferous 

 rocks. 



Neurotomies, (nu- 

 rot'6 miz). [Gk. 

 neuron, nerve; 

 tome, section.] Dis- 

 sections of nerves. 



Neutral, (nu'tral). 

 fL. neuter, indif- 

 ferent.]=iV. salts 

 Normal salts: 

 which are neither 

 acid nor alkaline. 

 JV. line: in magnet, 

 between the poles; 

 where there is no 

 magnetic power. 

 N. point: of polar- 

 isation, v. Polar- 

 isation. 



Nev<, (ne've). [The Neuropterfa. 



French word.] Snow converted into glacier 

 ice. 



Newfoundland dog. A variety of the dog, or 

 large size, originally found in Newfoundland. 



Newkirkite, (nu-ker'kit). [Newkirchen, in 

 Alsace.]=Manganite: a mineral, chiefly hy- 

 drate of manganese. 



New moon. When the moon has its dark 

 side turned to us. 



New red-sandstone, v. Bed-sandstone, 



New style=Gregorian style, v. Kalendar. 



New Zealand flax:=Phormium tenax, g.v. 



Newt, (nut). [Ev;t, theO.-E. name.] v. Newts. 



Newton, (nu'ton). [Sir Isaac Newton.] One 

 of the loftiest mountains in the moon; 

 nearly five miles in height. 



Newton's. N. disc: a circle, covered by 

 coloured strips of paper, arranged in the 

 order of the colours of the spectrum, which, 

 when made to revolve rapidly, appears white. 

 N. rings: a series of concentric rings, showing 

 the colours of the spectrum, seen when a 

 very thin layer is enclosed between two 

 plates of glass, one convex and one plane, 

 caused by interference of light. N. theory 

 of light: that it is composed of seven primary 

 lights, red, orange, yellow, green, blue, in- 

 digo, and violet. 



Newtonian telescope. A reflecting telescope 

 in which the image is reflected from a mirror 

 and brought to the eyepiece at the side by 

 means of a prism. 



Newts, (nuts). [Eicts, the O.-E. name.]= 

 Water Salaman- 

 ders: animals 

 belonging ^ 

 Urodela, q.v. 



Nicaragua wood = 

 St. Martha's 

 wood: a variety 

 of Brazil wood. 



Niccolite, ( nik'o- 

 lit). [L. Nicco- 

 lum, nickel.] = 



Kupfer-nickel: a red, opaque, brittle mineral 

 of the nickel group, crystallising in hexagons, 

 chiefly arseniate of nickel. 



Niche, (nich). [The French word.] A recess 

 adapted for a statue, &c. 



Nickel, (nik'el). [Abbreviation of kupfer- 

 nickel, the German name.]=Ni iv -: an iron- 

 like metal: a white, hard, tenacious, brilliant 

 metal, which is magnetic when cold. A con- 

 stitutent of meteoric iron, and of German 

 silver. N. bloom =N. green=Annabergite; 

 also called N. ochre. JN. rtcmce=Arsenio- 

 sulphide of N.=Gersdorffite: a native com- 



rnd of nickel, sulphur, and arsenicum. 

 pyrites: native sulphide of N. N. silver 

 =German silver, v. Silver. N. vitriol=~M.ore- 

 nosite. Antimonial JV.=Breithauptite. Ar- 

 semate of If. = Annabergite. Arsenical JV. 

 =Niccolite. Bismuth N. =Grunanite. Eme- 

 rald N. =Zaratite. Oxide o/A r .=Bunsenite. 



Nickeline, (nik'e-lin). [Nickel, 2.i>.]=Copper- 

 nickel: an ore of nickel. 



Nickelite, (nik'e-Ht). [Nickel, g.t>.]=Niccolite f 



Nicholson's hydrometer. Adapted to the esti- 

 mation of the specific gravity of solid bodies. 

 v. Hydrometer. 



Nicobarians. An Oceanic race. 



Nicol's prism, (nik'olz). [Professor Nichol, of 

 Glasgow.] Composed of two pieces of Ice- 

 land spar cemented together by Canada 

 balsam; it polarises light, and transmits only 

 the extra-ordinary ray,|the ordinary ray being 

 totally reflected by the balsam. 



Nicotia, (ni-ko'sbi-a). [M. Nicot.]= Nicotylia, 

 q.v. 



Nicotiana, ( ni-ko-shi-a'na ). [M. Nicot.]= 

 Tobacco: a plant belonging to Solanacese. 

 N. macrophylla=0rinoco tobacco. N. rus- 

 ticaTurkish tobacco=English tobacco. N. 

 ta&acm= Virginian tobacco: insectivorous. 



Nicotianin, ( ni-ko'shi-a-nin ). ( Nicotiana. ] 

 23^32^03 = Essential oil of tobacco: a 

 white crystalline substance obtained from 

 tobacco; also called tobacco-camphor. 



Nicotic acid, (nik'o-tik). [Nicotiana, q.v.] 

 03^04: a crystalline acid substance found 

 in tobacco. 



Nicotine, (nik'6-tin). [Nicotiana, q.v.]=Wi- 

 cotia=Nicotylia, q.v. 



r Nicotyl, (nik'o-til). [Nicotiana, g.v.]=C 10 H 14 : 

 j the hypothetical hydrocarbon in Nicotylia. 

 I Nicotylia, (nik-o-tll'i-a). [Nicotiana, q.v.]= 

 10ioHi4N2=Nicotine: a natural organic base, 

 the active principle of the tobacco plant; 

 one of the Nitrile bases; an oily inflammable 

 liquid. 



Nictitating membrane, (nik-ti-ta'ting). [L. 

 nicto, I wink.] A third eyelid, found in 

 birds: rudimentary in man. 



Nidification, ( nid-i-fi-ka'shun ). [L. nidus, 

 nest;/acio, I make.] Nest building, v. Nests. 



Nidulariacei, (nid-u-la-ri-a'se-i). [L. nidus, 

 nest.] Fungi, with coloured mycelium, cup- 

 like peridia, and lentil-shaped sporangia, 

 belonging to Gasteromycetes. 



Niello, (ni-ello). [The Italian word.] A kind 

 of engraving consisting of a design cut on 

 metal and filled in with a black composition. 



