! 
Registered at G.P.O., Wellington, as a Magazine. 
THE NEW ZEALAND BOARD OF SCIENCE AND ART. 
«« a « y ^-- 
fE B12 192 '°, 
THE 
ZEALAND 
JOURNAL OF SCIENCE 
AND 
TECHNOLOGY. 
Edited by 
Dr. J. ALLAN THOMSON ; 
Assisted by 
Dr. C. A. COTTON and Mr. S. H. JENKINSON, Wellington, 
Professor A. P. W. THOMAS, Auckland, 
Professors C. CHILTON and R. J. SCOTT, Christchurch, 
AND 
Professor W. B. BENHAM, Dunedin. 
Issued under the authority of the Hon, J. B. HINE, 
Minister of Internal Affairs. 
VOL. II.—No. 6. 
December, 1919. 
WELLINGTON, N.Z. 
By Authority: Marcus F. Marks, Government Printer. 
1919. 
ANNUAL SUBSCRIPTION, 6s. SINGLE COPY, Is. 6d. 
CONTENTS ON PAGE 4 OF COVER. 
