CONTENTS 
VOLUME IV, 1921-22. 
No. 1. —March, 1921. 
Page 
Mangahao Hydro-electric Scheme : The Structure of Mangahao No. 1 Gorge, and 
its Bearing on the Construction of the Proposed Dam. By G. L. Adkin .. 1 
Note on a Peculiar Dagger-like Weapon used by the Maori in Former Times. By 
E. Best .. .. .. .. .. .. .. .. 5 
Astronomical Notes . . . . . . .. .. .. .. 6 
Mean Hourly Values of the Magnetic Declination and the Horizontal Magnetic 
Force. By H. F. Skey 
• • 
13 
Reefton Coalfield. By J. Henderson 
. . 
18 
Notes to accompany a Geological Map of the Cheviot District. 
By J. Henderson 
24 
The New Zealand Institute Science Congress 
. . 
31 
Reviews and Abstracts .. 
* . . 
45 
No. 2.—April. 
The Geology of Western Samoa. By J. A. Thomson .. .. .. 49 
Polynesian Mnemonics : Notes on the Use of the Quipus in Polynesia in Former 
Times ; also some Account of the Introduction of the Art of Writing. By 
E. Best .. .. . . .. .. .. .. 67 
Chemical Technology of the Frozen-meat Industry. By A. M. Wright .. 74 
Notes on the Habits and Uses of the Toheroa. By M. K. Mestayer .. .. 84 
A Mystery of Fiordland : A Vanished Maori Tribe. By H. Beattie .. .. 86 
Astronomical Notes .. .. .. .. .. .. 91 
Natural-history Notes .. .. .. .. .. .. 96 
Correspondence .. .. .. .. .. .. .. 96 
No. 3.—June. 
Chemical Technology of the Frozen-meat Industry (Part II). By A. M. Wright 97 
The Failure of High-tension Insulators in a Damp Atmosphere. By E. Marsden 
and G. F. Ferguson .. .. .. .. . . .. .. 108 
Electric Power for Milking-plants. By L. Birks .. .. .. 110 
Notes on the Edible Fishes of New Zealand, with a Record of Fishes exposed for 
Sale in Wellington during 1918. By W. J. Phillipps .. . . . . 114 
Notes on Malarial Infection in the Imported Skylark. By A. B. Dore .. 126 
Thornhill’s Sodium-sulphide Process for the Recovery of Mercury, as applied to 
Cinnabar-ore from Puhipubi. By W. Donovan.. .. .. .. 129 
Astronomical Notes .. .. . . .. ' . . .. .. 135 
Natural-history Notes .. .. .. .. .. .. 139 
Reviews and Abstracts .. .. .. .. .. .. .. 142 
Correspondence ., .. .. .. .. .. ,. 144 
