LAEVJE 



LAWS OF MOTION 



Larvae, (lar've). [L. larva, mask.] Cater- 

 pillars: the early stage of insects, which con- 

 ceals the perfect form; the first stage after 

 the egg; v. Insects. Erttciform i.=Cam- 

 podea-form = Vermiform. Leptiform L.= 

 Lindia-form=.Hexapodous. 



laryngeal, (la-rinj'e-al). [Larynx, q.v.] Be- 

 longing to the larynx. 



Larynx, (lartngks). [Larygx, the Greek 

 word.] The upper portion of the windpipe, 

 which opens into the mouth; by means of 

 which vocal sounds are produced. 



Lasso-cells, (las'so). [Lazo, the Spanish word. ] 

 =Cnidae=Nettring cells=Thread-capsule8 : 

 minute extensile weapons, not retractile, of 

 Actiniae. 



Latent, (la'tent). [L. lateo, I am hidden.] 

 Hidden: not perceptible by the senses. L. 

 heat: that which is not perceptible by the 

 senses, and does not affect the thermometer. 

 L. heat of steam and other vapours: that 

 heat which is used in the conversion of a 

 liquid into a vapour, without being measur- 

 able by the thermometer; v. Steam. L. 

 heat of water: which is used to convert ice 

 into water =79 4C=143F. 



Lateral ventricle. A cavity in the centre of 

 the cerebral hemispheres of the brain. 



Laterite, (lat'er-it). [L. later, brick.] A red- 

 coloured rock, chiefly silicate of alumina and 

 oxide of iron. 



Lath, (lath). [W. llath, a rod.] A narrow 

 thin strip of wood. 



Latham, (la'tham). [Dr. R. G. Latham.] 

 L.'s classification of mankind 

 Mongolian. Indian. 



Turanian. Oceanic. 



Caucasian. American. 



European. African. 



L.'s classification of birds (by J. Latham.) 



Land birds Water birds 



Rapaces. Grallae. 



Pies. Pinnatipedea. 



Passerine. Palmipedes. 

 Columbinee. 

 Gallinse. 

 Struthiones. 



Lathrsea, (lath-re'a). [Gk. lathraios, hidden.] 

 =Tooth-wort: a plant, parasitic on roots of 

 trees, &c., belonging to Orobanohacese. 

 Lathyrus, (lath'i-rus). [Lathyros, the Greek 

 name. ]= Everlasting pea: an herb belonging 

 to Leguminacese. 



Latitude, (lat'i-tud), [Latitudo, the Latin 

 word.] Distance measured on the surface oi 

 the globe north or south of the equator. 

 of a star= Angular distance from the ecliptic. 

 Degree o/Z/.=60 nautical miles=:60 knots= 

 69i statute miles. 



Latrielle, (lat-ri-el'). [M. Latrielle.] 

 L.'s classification of birds 

 Terrestrial Aquatic 



Rapaces. Grallae. 



Passeres. Palmipedes, 



Grimpeura. 

 Passerigalll, 

 Gallinaces. 



(kt'fa), [ft Wtf, lath-work.] 



terlaced bars of wood or metal, used for 

 windows, doors, blinds, &c. 

 Jatus rectum, (la'tus rek'tum). [The Latin 

 words. ] The ordinate of a conic section , which 

 is drawn through the focus, v. Ordinate. 

 Laudanum, (law'da-num). [Ladanum, the 

 Latin word.]=Tinctureof opium: acompound 

 of opium and alcohol, used as a narcotic. 

 Laughing. L. crow = Cinclosoma erythro- 

 cephalus: a bird belonging to Merulidae. L. 

 grs=Nitrous oxide=Protoxide of nitrogen : 

 which, when inspired, produces a peculiar 

 kind of intoxication. L. jackass=L. king- 

 fisher=Da.celo gigantea: a bird of New Zea- 

 land. L. 2ftrMs7i=Trochaloptera phceniceum. 

 Launa, (law'na). A tree of Guiana, with 

 lemon-like fruit, the juice of which is used 

 as a dye. 



Lauraceae, ( law-ra'se-e ). [Laurus, Q,V.] = 

 Laurels: trees, with apetalous flowers and 

 fragrant leaves, belonging to Daphnales. 

 Laurel, (law'rel). [Laurus, the Latin name.] 



=Sweet Bay: an evergreen tree belonging to 

 Lauracese. American I/.=Kalmia. L. cherry 



=Cerasus. 



Laurentia, ( law-ren'shi-a ). An edible sea- 

 weed belonging to Algae. 

 Laurentian, (law-ren'shi-an). [St. Lawrence 



River. ] Crystalline rocks of great thickn ess, 



the oldest known rocks, which contain very 



few fossils, and belong to the Primary 



division of formations. 

 Laurie acid, (law / rik)=Ci2H 2 40o: obtained 



from cocoa-nut oil. 



Laurin, (law'rin). [Laurus, q.v.] An alka- 

 loid principle found in the laurel. 

 Laurus, (law'rus). [The Latin name.]= 



An evergreen tree: the type of Lauraoete. 



L. no6iii=Sweet bay. L. chloroxylon= 



Greenheart, q.v. 

 Laurustine, (law'rus-tin)=: Viburnum tinus : 



a plant belonging to Caprifoliaceaa. 

 Lauryl, (law'ril). [Laurus, 9.1?.] The radicle 



of lauric acid. 

 Laurylene, (law'ri-len). [Laurus, q.v.] A 



hydrocarbon obtained from naphtha. 

 Lava, (la'va). [L. lava, I bathe.] Used for 



any molten matter flowing from volcanoes: 



properly limited to such as has reached the 



surface, v. Trap. 

 Lavandula, (la-van'du-la). [The Latin name,] 



An aromatic plant belonging to Lamiacese. 



L. vera = Lavender. L. latifolia = Spike 



lavender. 

 Lavatera, (lav-a-te'ra). [M, Lavater of S witzer- 



land.]=Tree mallow: a plant belonging to 



Malvaceae. 

 Lavender, (lav-en-der). [Lavandula, q.v.]= 



Lavandula, q. v, Sea l/.=Statice. 

 Lawn, (lawn). [L. linum, flax.] A woven 



fabric made of fine linen. 

 Laws of motion, 1. A body if at rest will 



continue so; or, if moving, will continue to 



move in a straight line with uniform velocity, 



until acted on by some external force. 2. 



Every force acting on a body affects its 



motion equally, whether it act singly or in 



combination with others, 3, Actio and re* 



action are equal and opposite, 



