1918.] The N.Z. Journal of Science and Technology. 
33 
Zealand , 1913, by P. G. Morgan and, J. A. Bartrum.* The compilation 
of the present list was suggested by a recent article in the Mining and 
Scientific Press f (San Francisco), written by Herbert Lang, and entitled 
“ Secondary Economic Minerals of California.” Much of the information 
here given has been taken, with little or no alteration, from Mr. Lang’s 
article. 
Alum-shale. —Manufacture of alum, aluminium sulphate. 
Alunite.- —Manufacture of potash, aluminium sulphate. When ground, can 
be applied direct to soil as a fertilizer (on account of potash-content). 
Amphibole (Hornblende, &c.).-—Powdered amphibole rocks (and most other 
rocks) may be used for heat-insulation. See also Asbestos. 
Antimony-ore. —Manufacture of metallic antimony, antimony - alloys, and 
numerous compounds. 
Arsenic-ore.- —Manufacture of white arsenic, paris - green, arsenical soap, 
sodium arsenate, yellow and red orpiment (pigments), and various other 
substances. Arsenic disulphide is used in calico-printing, dyeing, 
tanning, and' fireworks trades. White arsenic is used as a poison, in 
glassmaking, and in manufacture of substances mentioned above. 
Asbestos. —Used in fireproof paints, incombustible curtains (for theatres, &c.), 
cloth, rope, felted boards, wall-plaster, patent shingles, roofing, asbestos- 
cement, paper - stock, piston and valve packings, in the fireproof 
packing of safes and vaults, and for heat-insulation generally. The 
name “ asbestos ” as here used includes both “ true ” asbestos and 
“ chrysotile ” asbestos. 
Bante (Barytes, Heavy-spar).-—Manufacture of paint (especially lithophone), 
linoleum, putty, pottery, artificial ivory, glass, paper, and various 
chemicals. Also said to be used in the manufacture of some classes 
of rope and rubber. 
Brown Coal. —See Coal, Lignite. 
Building-stone.- —Building-stones are not here enumerated as such. See, 
however, Granite, Limestone, Marble, Serpentine, Slate. 
Calcite.- —See Limestone. 
Carbon Dioxide.- —Used for aerated waters, &c. This gas issues in quantity 
from oil-bores at Kotuku (Westland) and at New Plymouth. 
Chalk.- —Manufacture of cement, whiting, putty, carbon dioxide, &c. Used 
in agriculture as a soil-dressing, after being broken in small pieces or, 
if necessary, ground. Its use as a rough writing - material hardly 
requires mention. Blackboard “ chalk ” or crayons, however, are 
prepared from gypsum. 
Chromite (Chrome-iron Ore).—Manufacture of chrome steel, and of refrac¬ 
tory linings for steel-furnaces. Chromium salts are used in tanning 
(chrome leather), in photography, and in manufacture of dyes and 
colours (chrome-yellow). 
Chrysotile. —See Asbestos. 
Cinnabar (Mercury-ore).-—Metallic mercury is largely used in the extraction 
of gold and silver from their ores (amalgamation processes). It has 
many other uses in arts, manufactures, and scientific laboratories. 
Compounds of mercury have numerous important uses. 
* Many additional localities have been noted since this publication was issued, 
both in the previous literature and as new discoveries. Few of these, however, are 
of known importance. An exception is that of clays or allied substances suitable for use 
as fuller’s earth. Such clays are now known to exist in the Gore, Waipa, and Whangarei 
districts, and, it is believed, in the Gisborne district, 
t Vol. 114, No. 10, 10th March, 1917, p. 334. 
3—Science. 
