Registered at G.P.Q., Wellington, as a Magazine. 
THE NEW ZEALAND BOARD OF SCIENCE AND ART. 
_ 
a* 
THE 
NEW ZEALAND 
£ 
% 
% : 
*tC 9 1 
° i 70 O/ 
^ ; 
JOURNAL OF SCIENCE 
AND 
TECHNOLOGY 
Edited by 
Dk. J. ALLAN THOMSON ; 
Assisted by 
Dr. C. A, COTTON, Mr. S. H. JENKINSON, and Professor E. MARSDEN, 
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. G. J. ANDERSON, 
Minister of Internal Affairs, 
VOL. III.—No. 3. 
September, 1920. 
WELLINGTON, N.Z. 
By Authority: Marcus F. Marks, Government Printer. 
1920. 
ANNUAL SUBSCRIPTION, 6s. SINGLE COPY, Is. 6d. 
CONTENTS QM PAGE 4 OF GOVEf?. 
