312 Geological Society : — 



midst of metaniorphic slates and sandstones at a distance of about 

 six miles. The lodes run in parallel lines bearing about N. 50° E. ; 

 and one of them can be traced for a distance of nine or ten miles. The 

 ore, according to Mr. Gregory and Mr. D'Oyly Aplin, is always asso- 

 ciated with red granite — ?. e. " the felspar a pink or red orthoclase, 

 and the mica generally black ; but when crystals of tin- ore are found 

 in situ, the mica is white." The crystals of tin-ore are generally 

 found in and along the margins of quartz threads or veins in bands 

 of loosely aggregated granitoid rock, but are sometimes imbedded 

 in the micaceous portions. The report concludes with some state- 

 ments as to the present condition and prospects of the district as 

 regards its population. 



2. " Observations on some of the recent Tin-ore Discoveries in 

 New England, New South Wales." By G. H. E. Ulrich, Esq. 

 E.G.S. 



The district referred to by the author is in the most northern part 

 of the colony of New South Wales, almost immediately adjoining 

 the tin-region of Queensland described in the preceding report. It 

 forms a hilly elevated plateau, having Ben Lomond for its highest 

 point, nearly 4000 feet above the sea-level. The predominant rocks 

 are granite and basalt, enclosing subordinate areas composed of 

 metamorphic slates and sandstones ; the basalt has generally broken 

 through the highest crests and points of the ranges, and spread in 

 extensive streams over the country at the foot. 



The workings of the Elsmore Company, situated on the north- 

 west side of the Macintyre river, about twelve miles E. of the town- 

 ship of Inverell, include a granite range about 250 feet in height 

 and nearly two miles in length. The granite of the range is micaceous, 

 with crystals of white orthoclase, and is traversed by quartz-veins 

 which contain cassiterite in fine druses, seams, and scattered crystals, 

 and by dykes of a softer granite, consisting chiefly of mica, and with 

 scarcely any quartz, in which cassiterite is distributed in crystals, 

 nests, and bunches, and also in irregular veins several inches 

 in thickness. This granite yields lumps of pure ore up to at least 

 50 lbs. in weight. The quartz-veins contain micaceous portions 

 which resemble the " Greisen " of the Saxon tin-mines. The deepest 

 shaft sunk in one of the quartz-veins was about 60 feet in depth. 

 The author noticed certain minerals found in association with the 

 tin-ore, and the peculiarities of the crystalline forms presented by 

 the latter. 



The drift is very rich, and consists of a generally distributed 

 recent granitic detritus, from G in. to 2 ft. thick, and of an older 

 drift (probably Pliocene) capping the top of the range, and probably 

 dipping beneath the adjoining basalt. The washing of the granitic 

 detritus gives from 3 ozs. to more than 2 lbs. of ore per dish (of 

 about 20 lbs.). The older drift is rather poor in tin to within about 

 a foot of the bottom ; but the bottom layer is in part very rich, some 

 having yielded as much as 6 lbs. of ore per dish. 



The author also described the Glen Creek, about 40 miles north 



