THE NEW ZEALAND BOARD OF SCIENCE AND ART. 
THE 
NEW ZEALAND 
JOURNAL OF SCIENCE 
* 
AND 
TECHNOLOGY. 
VOLUME II. 
Edited by 
Dr. J. ALLAN THOMSON; 
Assisted by 
Dr. C. A. COTTON, Messrs. S. H. JENKINSON and EVAN PARRY 
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 Minister of Internal Affairs. 
WELLINGTON, N.Z. 
By Authority : Marcus F. Marks, Government Printer, 
1919. 
