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OAD TMP cobs 
N. Z. ROCKS. 127 
Taranakite (New Mineral)—Hydrated Phosphate 
of Alumina, Sugar Loaves, Taranaki. 
Fragments of Quartz, with Crystals of Barytes. 
Silver Ore. Silver Crown Claim, Thames. 
Scheelite (Tungstate of Lime). Maori Point, 
Dunstan, Otago. ~ 
Scheelite, prepared for decomposition by pulveriza- 
tion and levigation. 
Scheelite, decomposed by hydrochloric acid, the 
tungstic acid being thereby liberated and the 
lime removed. 
No. 2 treated with ammonia, to remove the 
liberated tungstic acid from the impure ore, and 
the resulting Tungstate of Ammonia crystallized. 
No. 3 ignited, the ammonia being thus expelled, 
the pure Tungstic Acid remains. 
Tungstate of Soda, used as a mordant in lieu of 
the stanates. 
Tungstate of Soda, occasionally used as a substitute 
for white lead. 
Black Oxide of Tungsten, proposed as a substitute 
for Plumbago. 
Black Oxide of Tungsten, prepared by the sudden 
refrigeration of the acid. 
SELECTED SPECIMENS OF GOLD AND 
GOLD-BEARING QUARTZ. 
ALLUVIAL GOLD. 
Fine Gold dust, with Platinum. Southland, 
a. Iron and Platinum dust. Southland. 
}. Platinuin dust. Southland. 
Shotty Gold, in Black Sand. Cornish Reef, Otago. 
Tine Sealy Gold. Moeraki, Otugo. . 
Fine Flaky Gold. Haast River. 
Sealy Gold. Okarita Beach, 
Fine Gold dust. Mikanui Beach. 
Joarse Sealy Gold. ‘Totara River. 
Lemon-tinted Scaly Gold. Donaghues. 
