1918.] 
353 
The N.Z. Journal of Science and Technology. 
1318 
d h 
JUNE 10:2.2. G.M.T 
23—Science. 
•+3 ■?*? -75 *76 t-7 '78 -rS' SO 5! 5253 55 57 S3 61 63 65 
Reference 
/°rZ 
e9:ei 
^5 
Qj 
■ § 
< s: 
,5-v Ss 
I 
^ CQ C? 
3 
1? 
* .Continuous 
[Spectrum 
