** 
— 
Registered at G.P.O., Wellington, as a Magazine. 
THE NEW ZEALAND BOARD OF SCIENCE AND ART. 
* 916 
THE 
fyjTmr ixt&i 
NEW ZEALAND 
JOURNAL OF SCIENCE 
AND 
TECHNOLOGY. 
Edited bv 
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 wider the authority of the Hon. G. W. RUSSELL, 
Minister of Internal Affairs. 
Vol. II.—No. 3. 
May, 1919. 
WELLINGTON, N.Z, 
By Authority: Marcus F. Marks, Government Printer. 
1919. 
Annual Subscription, 6s.; Single Copy, Is. 6d. 
CONTENTS ON PACE 4 OF COVER. 
