BY EDWD. B. LINDON, A.R.S.M. 71 
the tin is without parallel on the field. It is massive penninite 
or hydrous talc, which can be scratched with the finger-nail. 
Sometimes it occurs in fine apple-green scales. The rock is grey 
at the surface, but becomes greenish at the lower level. Copper 
pyrites and tin ore are interspersed throughout, especially in 
agate-like bands round certain small isolated masses of quartz. 
The tin ore is very black.” 
CHLORITE—Compp. chiefly hydrous silicate of alumina and magnesia 
This mineral is of very wide occurrence in the Tinaroo district, 
forming the matrix of a large portion of the cassiterite obtained 
from that locality. The mineral is commonly of a dark green 
colour, but is sometimes red from the presence of oxide of iron, 
and sometimes purple from oxide of manganese. 
XI'1.—PHOSPHATES. 
APATITE—Comp. chiefly phosphate of lime. 
This mineral is not of common occurrence here; it has been 
found at Ravenswood, and is mentioned by Mr. R. L. Jack as 
forming a network of minute needle-like crystals interlacing with 
triclinic felspar, as seen under the microscope in the diorite of 
Plant’s Range, Charters Towers. 
PyROMORPHITE—Comp. phosphate and chloride of lead. 
Pyromorphite has up to the present been noticed in only a few 
localities, such as the Gilbert River, the Burdekin River, and 
New Rush, Ruby River, where it occurs accompanying other ores 
of lead. 
CACOXENITE—Comp. hydrous phosphate of iron. 
This mineral from Watt’s selection, Logan district, was noticed 
by Mr. Rands and referred to me. It occurred on the edge of a 
mass of limonite in tufts of a yellow colour. 
XIII.—TUNGSTATES. 
WoLFrRAM—Conpp. tungstates of iron and manganese. 
This mineral has been found on Noble Island of a very dark 
blue colour in quartz; also in considerable quantity around 
Stanthorpe, being often associated with cassiterite. In the tin 
mines of the Tinaroo district this troublesome mineral often 
occurs, as in the Soggaorth in quartz and in pockets of ferru- 
ginous chlorite, in the Defiance with fluorspar, in the Young 
