BISMUTH MINERALS, MOLYBDENITE & ENHYDROS — LIVERSIDGE. 35 



crystal rising fr^m, and crossing the horiaontal ones. In 

 other cases the plates of molybdenite penetrate the crystals of 

 quartz, and pass between the adjacent faces of the rock crystal. 

 Some of the quartz crystals are cavernous, and have the vugs 

 lined with small crystals of quartz, showing the usual combination 

 of the prism and pyramid. In one specimen the molybdenite is 

 seated on tinstone. From Kingsgate, Glen Innes, N.S.W. 



Molybdenum ochre. 



In the form of yellow patches consisting of felted acicular 

 crystals. From Kingsgate, Glen Innes, N.S.W. 



Enhydros, or Water Stones. 

 (Plates ix. x.) 



No locality is given for these, but they so closely resemble 

 those formerly found at Spring Creek, Beechworth, Victoria, that 

 they in all probability come from that place. The specimens 

 figured on plates ix. and x. are remarkable for their large size, the 

 plates show them of their natural dimensions, except that plate x. 

 is much foresliortened from a to h, being 7^- inches in length 

 instead of about 2| as shown. Plate ix. shows the hollow nature 

 of these enhydros, where the ends having been broken off, the 

 interior is thickly coated or lined with small pyramids of quartz 

 crystals, the thicker one (plate x.) is also hollow, and each of the 

 plates of which it is made up is likewise hollow or shows a 

 tendency to form a cavity at the thicker parts ; in some this is 

 merely indicated by a crystalline structure. One of the enhydros, 

 not figured, is attached to a lump of ordinary quartz. The outer 

 surfaces of all of them are of very hard, smooth chalcedony, having 

 a horny appearance and brownish colour, stained with iron oxide. 

 The sp. gr. is 2*6G, i.e. the usual sp. gr. of quartz. Hardness 

 = 7*5. None of these three retained any liquid. 



Mr. E. J. Dunn described the mode in which the enhydros 

 occur at Spring Creek, in a paper read before the Royal Society 

 of Victoria (Trans. R.S. of Vic, 1870, p. 32) ; they are found in 

 a dyke in granite, the dyke is composed of fragments of granite 

 and occasional pieces of sandstone cemented by crystallised 

 quartz, together with large masses of coarse chalcedony and 

 straight veins of chalcedony scales and clay. Mr. Dunn 

 mentions that the enhydros vary in size from that of a split pea 

 to five inches across, and that many of them contain a fluid ; 

 after a few days exposure they usually show an air bubble, 

 in many the fluid disappears altogether in a few days ; the 

 walls of some are as thin as a sheet of paper and very fragile, 

 while others have walls \ inch thick. On p. 71 of the same 



