THE NEW ZEALAND 
JOURNAL OF SCIENCE 
AND 
TECHNOLOGY. 
CONTENTS. 
Page 
Editorial: Scientific Publications of Government Departments .. .. .. 1 
B. C. ASTON. Preliminary Note on the Tinctorial Properties of the Genus Coprosma 
(Family Rubiaceae) .. .. .. • . .. .. .. 3 
D. MILLER. A New Fungus-gnat which fertilizes Corysanthes oblonga Hook. .. 4 
H. V. ROWE. A Systematic Examination of the Refractory Clays of the Canter¬ 
bury District, with Special Reference to their Use for Firebricks and Furnace- 
linings (Manuscript deposited in the Dominion [Museum) 4 
J. A. THOMSON. Records’of New or Rare Fish from New Zealand Waters .. 5 
J. A. THOMSON. Is a Sardine Industry practicable in New Zealand ? .. .. 7 
C. A. COTTON. New Zealand’s Niagara .... .. 9 
J. HENDERSON. Notes on the Geology and Mineral Occurrences of the Waka- 
marina Valley .. .. ,' . .. .. .. .. 11 
L. BIRKS. Economic and Scientific Developments resulting from the Lake Coleridge 
Hydro-electric Power-supply .. .. .. .. .. .. 16 
E. BEST. The Maori System of Measurement .. .. .. ..26 
P. G. MORGAN. Commercial Uses of New Zealand Minerals (chiefly Non-metallic) 
and Rocks .. .. j .. .... .. .. .32 
D. M. DEANE. The Concentration of Ores by Flotation .. .. ..39 
J. E. L. CULL. Experiments on the Smelting of New Zealand Ironsand .. 43 
E. PARRY. -The Economics of Electric-power Distribution .. .. . 49 
J. HENDERSON. Notes on the Geology of the Waikato Valley near Maungatautari 56 
Reviews .. .. .. .. .. .. . .... 60 
Recent Publications .. .. .. .. .. .. 62 
NOTICES. 
SUBSCRIPTIONS.—The Journal will be issued six times a year. The subscription, 
which is payable in advance and includes postage, Is 6s. per annum ; single copy, Is. 6d. 
Subscriptions should be forwarded by postal note to the Director, Dominion Museum, 
Wellington. Subscribers are requested to furnish their full names and addresses. 
CORRESPONDENCE.—All communications relative to the Journal should be 
addressed to the Editor, Dominion Museum, Wellington. 
