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Registered at G.P.O., Wellington, as a Magazine 
THE NEW ZEALAND BOARD OF SCIENCE AND ART. 
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NEW 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. G. W. RUSSELL. 
Minister of Internal Affairs. 
VOL. II.— Nos. 4 AND 5. 
July, 1919. 
Wellington, n.z. 
By Authority: Marcus F. Marks, Government Printer. 
1919. 
Knn 
Annual Subscription, 6s. Single Copy, Is. 6d. This Number, 3s. 
CONTENTS ON PACE 4 OF COVER. 
