MAUILITE. 



Comp. Pb CI + Pb, = chloride of lead 55-5, 

 oxide of lead 44-5 = 100, 



Analysis, from Cromford, by Dr. R. A. 

 Smith ; 



Chloride of lead . . . 55-177 

 Oxide of lead . . . 44-300 

 Water .... 0-072 



99-549 



BB decrepitates, and on charcoal fuses 

 easily to a greyish-yellow globule. 



Readily soluble in nitric acid. 



Locality. Near Cromford in Derbyshire, 

 in one of the air-shafts of an old level. 



Brit. Mus., Case 57b. 



Mauilite. a variety of Labradorite 

 occurring in glassy colourless crystals, in 

 Maui, one of the Sandwich Islands. 



naliJsis, by Schlieper ; 





Silica .... 



. 53-98 



Alumina 



. 27-56 



Peroxide of iron . 



. 1-14 



Lime .... 



. 8-65 



Soda .... 



. 6-06 



Potash .... 



. 0-47 



Magnesia 



. 1-35 



99-21 



Meadow Ore, Jameson. Meadow Iron- 

 ore, Kirwan. See Bog Iron-ore. 



Mealy Zeolite. The name sometimes 

 given to the delicate interlacing crystals of 

 Mesolite, when crushed. 



Medjidite, J. L. Smith. Massive, with 

 an imperfectly crystalline texture. Colour 

 dark copper-yellow. Lustre vitreous. Trans- 

 pai-ent. Often dull externallj^ owing to 

 the loss of water. Fracture horny. H. 

 2-5. 



Comp. Sulphate of uranium and lime, or 



^S + CaS + 15H. 





Analysis ; 





Sulphate of uranium . 



. 37-21 



Sulphuric acid 



. 20-67 



Lime .... 



. 7-24 



Water .... 



. 34-88 



lQO-00 

 BB with borax behaves like Liebigite. 

 At a gentle heat it loses water and assumes 

 a lemon-yellow colour ; blackens at a red 

 heat, being converted into oxide of uranium 

 and sulphate of lime. 



Dissolves sparingly in dilute muriatic 

 acid. 



Localities. Near Adrianople In Turkey, 

 accompanying an impure variety of Pitch- 

 blende, and associated with Liebigite. 



MEGABEOMITE. 231 



Joachimsthal in Bohemia, on Uranium Ore, 

 with Liebigite. 



Name. In honour of Abdul Medjid, 

 Sultan of Turkey. 



Meerschauim, Werner. Compact. Colour 

 white or yellowish. Dull and opaque. 

 Adheres to the tongue. Yields to the nail. 

 Feels smooth. Streak shining. Fracture 

 earthy. H. 2 to 2-5. S.G. 1-3 to 1-6. 



Comp. Hydrated silicate of magnesia, 



orMg Si + 2H = silica 60-9, magnesia 26-1, 



water 12-0 = 100. 



Analysis, from Asia Minor, by Lychnell: 

 Silica . . . . \ 60-87 

 Magnesia .... 27-80 

 Peroxide of iron and alumina 0-09 

 Water 11-29 



100-05 



BB shrinks up,"becomes hard and fuses at 

 the edges to a white enamel. 



Localities. In stratified earthy or allu- 

 vial deposits, at the plains of Eski-shehr in 

 Asia Minor, and at Kiltschik, near Konieh, 

 inNatolia. Islands of Samos and Negro- 

 pont. Greece. Hungary. Hrubschitz in 

 Moravia. Coulommiers, Dept. Seine-et- 

 Marne, forming a bed in the upper green 

 marls of the freshwater limestone of La 

 Brie. Spain ; at Valecas near Madrid, and 

 near Toledo. Morocco. 



Name. It is named Meerschaum, or froth of 

 the sea, from its lightness and white colour. 



Meerschaum when first dug up is soft and 

 forms a lather like soap ; on Avhich account, 

 and from its absorbing grease, it is used by 

 the Turks for fuller's earth, for cleansing 

 purposes, and in washing their linen. The 

 Turks are also said to eat it as a medicine, 

 but its principal use is in the manufacture of 

 tobacco-pipes, for which it is peculiarlv 

 adapted from its porosity, which causes it to 

 absorb the oily matter given out in smok- 

 ing, and in doing so to acquire a beautiful 

 warm-brown colour. The bowls of the pipes, 

 when imported into Germany, are prepared 

 for sale by soaking them first in tallow, 

 then in wax, and finally by polishing them 

 with shave-grass. Sometimes they are arti- 

 ficially stained by steeping them (before 

 being soaxed in wax) in a solution of 

 copperas, either alone or tinged with dra- 

 gon's blood. 



Brit. Mus., Case 25. 



M. P. G. Horse-shoe Case, Nos, 1188 

 to 1194. 



Megabromite, Breithaupt. A variety of 

 Chloro-bromide of Silver, bearing a strong 

 Q 4 



