MUG SUPPLEMENT. NOB 



K> as to prevent the thing to which It is Office, Vienna, and since brought to gre 

 attached from slipping out. efficiency by Mr. Henry Bradbury and others 



MUCKO.N AT K, any organ terminating in The process consists of taking any indented 

 sharp, hard point. impression, on thin sheets of fresh cut lead, 



MURCHI.XUMTK, a red and yellow or of specially dried plants, or leaves with the 

 golden rariety of felspar discovered by Sir juice squeezed out between thick blotting 

 Roderick I. Murchison. paper. Alter the plants are separated from 



MUKIOATK, surfaces covered with short the sheets of lead, the latter are subjected to 

 pointed cones not closely set together. a metallic deposit of copper, which reproduces 



Jlusciu^K, the family of dipterous the impression of the plants in relief . This 

 insects, of which ilusca (the fly) is the agiin is subjected to a second deposit of 

 typical genus. copper, reproducing the first impression, as 



MUSKAT, a sweet and fine rich wine taken by the lead, but on a plate sufficiently 

 from the over-ripe Muscadine grapes of the hard for printing purposes. By this means 

 south of France. Nature is made her own draughtsman, and 



MYCELIA, the flonculent filaments of a perfect fac-simile is the result, 

 fungi. , NAUMANXITE, native selenide of silver. 



MYDRIASIS, unnatural dilation of the NAVAL ARCHITECTURE, the designing 

 pupil of the eye. and draughting of the designs of ships. It 



AfYELov, the spinal chord and spinal involves a consideration of many details and 

 marrow collectively. principles, and is in most respects an inver- 



MYTILACKANS', the family of bivalve siou of house building, the vessel depending 

 shells of which the ^Ifytilus, or common for stability on her floating power from above 

 mussel, is the typical genus an< * her power of resisting pressure from 



below, while the house depends on the foun- 

 dation and the power of resisting pressure 

 N downwards. 



I NEGATIVE, in photography, the first im- 



NABOXASSAR, ERA OF an era of Astro- pressiou of an object, from which other im- 

 nomy adopted from the Chaldeans by Hip- pressions are printed. 



parchus and Ptolemy, and said to refer ^EMOPHlLA.a genusof flowering annuals 

 the observation of eclipses to the beginning belonging to the order Hgdrophyllacete, and 

 of the reign of Nabonassar. Niebuhr and Sir familiarly exemplified by the garden annual 

 G. C. Lewis are at conflict as to Nabonassar. *' Jntignu. 



Mr. Grote says, in his History of Greece, AKOLITE, a massive variety of talc, in 

 that the earliest astronomical observation of whicl i alumina partially replaces silica, 

 the Chaldeans known to Ptolemy was a lunar >TYPE, a variety of Natrocalcile, so 

 eclipse of March 19th, 721 B.C., the 27th year called because of its novelty of form on first 

 of the Era of Nabonassar. This is, after all, discovery, due to its containing barytes. 

 everything that appears requisite, the era of > EPHROTOMY, the surgical operation of 

 Nabonassar being held to begin with Feb- extracting stone from the kidneys. 

 ruary 26th, 747 B.C. The date is a sufficiently NEREIDES, the sea nymphs, daughters of 

 definite one for astronomical purposes. Nereus, the son of Ocean and Earth. 



^At'iiiTE. a silicate of alumina, consisting NEUHICITY or JS'EURILITY, the fibrous 

 of fine talcose pearly scalei. structure of the nerves. 



NAN-HIT, the Bhea Americana, or Ameri- NICKEL BLOOM, arsenate of nickel, 

 can ostrich. i NICTITATION, a nervous affection of the 



NAOS, the portion of a temple enclosed by eyelids, consisting of inordinate winking. 

 tiwwaUR. Itwassituatedbetweenthepronao* NIGUED ASHLAR, rough-dressed stone; 

 in front, and the poiticum in the rear, of the same as hammer-dressed stone. It is 

 the entice. It is the origin of the word used in the basements of various public 



n*re," which, however, is applied to the buildings and private dwellings where stone 

 middle portion of Gothic chumhes, between is employed. 



the two side aisles and to the west of the, NITKO-CALCITE, native nitrate of lime. 

 -Choir. NOOTH'S AITAUATTS, an arrangement 



-N ARPOO, the A'arsilia Macropus or Sal- for introducing carbonic acid gas into water, 

 Vtttrix, an Australian plant, the seed? or now superseded by the geuogene. 

 spores ad spore cases of which furnish a NORUAGHK, a remarkable series of Sar- 

 m;-fU from which the natives make bread dinlan monuments of great antiquity and 

 and a idd of porridge. unknown use, but supposed to be tombs of 



NATATORY, that characteristic of a limb illustrious individuals. They are elliptical 

 fcy waith it is adapted for swimminr. or circular truncated cones, with doors open- 



JfATiVK AMAH; AM, a native 'alloy of ing to the south-east, and giving access to a 

 eUver and mercury, sometimes found in per- corridor communicating with two ranges of 

 feet crystals. chambers, through which the central tower 



NATURE PRINTING, an art first prac- is reached They are sometimes single, some- 

 Jed by M. Auer, of the Imperial Printing times oonaosed of several united ; sometime*. 

 Ml 



