N.i:v 



NAP 



MUZZLE. The nose of an animal. 

 A kind of lialter fastened over the 

 nose to prevent an animal from biting. 

 Muzzle of a plough i.s the end of the 

 beam to which the clevis is attached. 



MYCELLA. The young, floccu- 

 lent filaments of fungi. 



MYOLOGY (from fivuv, a muscle, 

 and ?Myur, a discourse). An account 

 of the muscles of the body. 



MYOPS. Shortsightedness. 



MYRIAMETER. Ten thousand 

 metres, equal to two leagues. 



MYRICIN. That portion of wax 

 which is insoluble in alcohol. 



MYRISTICAGE-i:. A family of 

 tropical trees, exogens, containing the 

 nutmeg. They are nearly allied to the 

 laurels. 



MYRONIC ACID, MYRON- 

 ATES. An acid existing in crucif- 

 erous seeds, and containing sulphur. 



MYROBALAXS. A bitter, aus- 

 tere fruit, used in India in calico dye- 

 ing and medicine. 



MYROSYNE. A substance re- 

 sembling emulsin, or caseum, in mus- 

 tard seeds. 



MYRRH. An odoriferous gum 

 resin imported from the East, and 

 supposed to be the product of a spe- 

 cies of /I my?/*. Sweet cicely is some- 

 times called by this name. 



MYRTACE^. A family of small 

 trees and shrubs, particularly devel- 

 oped in tropical climates, and yield- 

 ing the pimento, cloves, guava, caje- 

 put, and other aromatic products. 



MYRTLE. Myrtus communis. An 

 evergreen, fragrant bush with white 

 flowers. It is a Southern plant, and 

 requires protection from frosts. 



MYRTLE BILBERRY. The 

 whortleberry. 



MYRTLE, DUTCH, or SWEET 

 GALE. Mijrkagak. A sweet-scent- 

 ed, swamp shrub, three or four feet 

 high, bearmg waxy berries. 



N. 



NACREOUS. Reflecting irides- 

 cent light, like pearl. 



NACRITE. A pearly mineral. 

 Silicate of alumina and potash 



N ..E V U S. A natural mark or 

 blotch on the skin. 

 514 



NAG. A small horse. 



NAILS. The horny extremities 

 of the skin, modified into claws, tal- 

 ons, hoofs, &c. They are of the same 

 composition as hair, and yield an 

 equally valuable manure. 100 lbs., 

 during decomposition, yield 20 lbs. 

 of ammonia. They are best in com- 

 posts, at the rate of 300 to 400 lbs. 

 to the acre, and show their eflects 

 for several years. The composition 

 of horn gives that of nails, hoofs, 

 &c., 52 carbon, 6 7 hydrogen, 17 3 

 nitrogen, 24 oxygen and sulphur, with 

 less than one per cent, ashes, in 100 

 parts. All these textures are used 

 m the manufacture of glue. 



NAKED. In botany, without the 

 customary covermg, as a stem with- 

 out leaves, corolla without calyx, &c. 



NAKED DISEASE, PELT ROT, 

 HUNGER ROT. A disease of sheep 

 poorly kept, in which the wool, and 

 sometimes the horns and hoofs, drop 

 off. It is to be remedied, if taken m 

 time, by shelter and good food in suf- 

 ficient quantity. 



NAKED FLOORING. The tim- 

 ber-work of the floor. 



NANKIN, NANKEEN. A bufl' 

 colour. Calico may be dyed of this 

 colour by the following means : Take 

 300 lbs. of yarn, scour and boil in pure 

 water, wince the hanks in an alum 

 bath containing 2 lbs. of alum to 96 

 gallons of water at 165° Fahr. ; drain, 

 expose to the air, rinse in pure wa- 

 ter, and wring. Boil 40 lbs. of oak 

 bark, contained in a canvass bag, for 

 two hours, in 100 gallons of water; 

 wince the cotton through the boiling 

 bath a quarter of an hour ; while it is 

 draining above the bath, add 28 ounces 

 of alum ; and, when it is dissolved, 

 wince through again for a quarter of 

 an hour ; drain, wring, and expose to 

 the air. It is now of a yellowish col- 

 our. Make a clear limewater bath 

 of about 150 gallons, or a weak soda 

 lye ; dip the hanks, w ithout washing, 

 into it rapidly three times ; then 

 move each hank separately in the 

 bath until it is of the proper colour ; 

 squeeze, rinse, and air them, and, 

 finally, brighten by passing them 

 through a weak solution of tm. 



