THE NEW ZEALAND 
JOURNAL OF SCIENCE 
AND 
TECHNOLOGY. 
CONTENTS. 
ARTICLES:— 
W. N. BENSON. Some Estimates of the Age of the Earth 
C. A. COTTON. Problems presented by the Notocene Beds of Central Otago 
S. H. JENKINSON. Engine=balancing : The Connecting=rod 
E. BEST. Note on a Curious Steatite Figurine found at Mauku, Auckland .. 
E. PARRY. The Surge=chamber Problem 
B. V. PEMBERTON. Weather Forecasting in New Zealand 
G. P. ANDERSON. The Location of Long=distance Electric Transmission 
lines 
Page 
65 
69 
73 
77 
78 
87 
95 
ASTRONOMICAL NOTES 
The Origin of New Stars (No. 2) 
The Date of Easter 
109 
111 
DEPARTMENTAL REPORTS 
P. G. MORGAN. Talc, Manganese=ore, Clay and Fullers’ Earth, and Oil= 
shale in New Zealand .. .. .. .. .. ..112 
E. PARRY. Impounding Flood=waters .. .. .. .. ..121 
E. PARRY. The Electrical Properties of Three=phase Transmission lines .. 127 
UNIVERSITY AND SCIENTIFIC NEWS: 
Mining Education in New Zealand. New Zealand institute. Board of Science 
and Art .. .. .. .. .. .. 151 
REVIEWS AND ABSTRACTS:— 
Preliminary Report of the Water=power Committee of the Conjoint Board of 
Scientific Societies of Great Britain. Agricultural Research in Australia. 
Preserving Fish without Ice.. .. .. ..154 
RECENT PUBLICATIONS 
.. 157 
CORRESPONDENCE:— 
Manufacture of Chemicals and Drugs 
.. 160 
NOTICES. 
SUBSCRIPTIONS.—The Journal will be issued six times a year. Subscription, payable 
in advance and including postage, 6s. per annum ; single copy, Is. 6d. Subscriptions 
should be forwarded by money=order to the Director, Dominion Museum, Wellington. 
Subscribers are requested to furnish their full names and : ddresses. 
CORRESPONDENCE.— All communications relative to the Journal should be 
addressed to the Editor, Dominion Museum, Wellington. 
