MAC 



MAD 



a higher ortjanization, approaching 

 that of the Vimi/erir, or pine-trees. 



LYCOSA. A genus of s|)i(h^rs 

 dwelling in holes on the ground, or 

 in chinks, and pursuing their prey 

 with great activity. The tarantula 

 is of this kind. 



LYE. A fluid saturated with pot- 

 ash or other salts. 



LYME GRASS. See FJymus. 



LYMPH. The fluid of "the lym- 

 phatic vessels. It is slightly milky, 

 but becomes pink on exposure to air, 

 and divides into a clot and fluid part. 

 It is the surplus nutritious fluid re- 

 turned from every part of the body 

 to the blood through the thoraric 

 duct. 



LYMPHATIC GLANDS. In 

 anatomy, small masses formed of 

 contorted lymphatics, found in the 

 groin, axilla, mesentery, &c. 



LYMPHATIC HAIRS. In bot- 

 any, the transparent hairs on some 

 leaves. 



LYMPHATIC VESSELS. Minute 

 transparent tubes, found in every part 

 of the body, and discharging their 

 lymph into the thoracic duct. 



LYRATE, LYRATUS. A leaf 

 which is pinnatifid, but with segments 

 larger at the extremity than tiie foot 

 stalk. 



M. 



MACARONI. The dough of some 

 fine wheats drawn out into tubes. 



MACE. The envelope (anllus) of 

 the nutmeg. It is of a pleasant aro- 

 matic flavour, and contains much but- 

 yraceous oil. 



MACERATION. The softening 

 of animal or vegetable bodies by im- 

 mersion in fluids, either water, alco- 

 hol, ether, &c. 



MACHICOLATED. With para- 

 pets projecting beyond the walls, and 

 supported by arches springing from 

 corbels or consoles. 



MACHINE. In a general sense 

 this word signifies anything which 

 serves to increase or regulate the ef- 

 fect of a given force. Machines are 

 either simple or compound. The sim- 

 ple machines are usually reckoned six 

 472 



in number; namely, the lever, the 

 wlu'cl and axle, the pulley, the wedge, 

 the screw, and the funicular or rope 

 machine. Compound machines are 

 formed by combining two or more 

 simple machines. 



MACLAURA. Maclaura aurantica. 

 See Osage Orange. 



MACLE. Dark or black spots in 

 minerals, supposed to arise from in- 

 terruption in crystallization. 



MACULATE, MACULATUS 

 (from macula, a spot). Spotted. 



MADDER. Rubia ttnctorum {Fig). 



An herbaceous perennial of the family 

 KubiacccE. The following account of 

 its culture by Mr. Bateham is the 

 plan pursued for five years by Mr. 

 Swift, of Erie county, Ohio : 



" Soil and Preparation. — The soil 

 should be a deep, rich, sandy loam, 

 free from weeds, roots, stones, &c., 

 and containing a good portion of ve- 

 getable earth. Alluvial land is the 

 most suitable ; but it must not be wet. 

 If old upland is used, it should receive 

 a heavy coaling of vegetable earth 

 (from decayed wood and leaves). The 

 land should be ploughed very deep in 

 the fall, and early in spring apply 

 about one hundred loads of well-rot- 

 red manure per acre, spread evenly, 

 and ploughed in deeply ; then harrow 

 till quite fine and free from lumps. 

 Next, plough the land into beds four 

 feet wide, leaving alleys between 

 three feet wide ; then harrow the beds 



