308 The N.Z. Journal of Science and Technology. [Sept. 
in different localities. It would be best to call it “ silver-beech,” though 
it is gaining an Australasian reputation as “ Southland beech.” 
Fagus fusca. —In Auckland this tree is called “ black-birch ” ; in Wel¬ 
lington, “red-birch”; in Nelson, Marlborough, and Westland it is called 
“brown-birch”; and in Otago it is called both “red-birch” and “bull- 
birch.” The most suitable name is “ red-beech." 
Fagus cliffortioides.- —This tree much resembles F. Solandri, but it is 
found generally only at high altitudes ; it is unlikely to be of much value 
as a timber, though it is of great use to retard soil-erosion. The most 
suitable name for it is “ mountain-beech.” 
Mean Hourly Values of the Magnetic Declination and 
the Horizontal Magnetic Force. 
By H. F. Skey, B.Sc., Director of the Magnetic Observatory. 
(Communicated by the Surveyor-General.) 
Christchurch Observatory. (Latitude, 43° 31'*8 S.; longitude, 172° 37'*2 E.) 
Magnetic Declination, E. 16° -(- Tabular Minutes of Arc. 
Year 1915. 
G.M.T. 
Jan. 
Feb. 
Mar. 
April. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
Annual I 
Means. | 
h. 
/ 
/ 
/ 
/ 
'/ 
/ ' 
/ 
/ 
/ 
/ 
/ 
/ 
/ 
0 
47-4 
46-1 
47-3 
47-1 
47-6 
47-8 
47-9 
47-5 
47-3 
48-2 
47-4 
48-2 
47-5 
1 
49-0 
48-6 
49-1 
48-9 
48-8 
48-7 
48-9 
48-9 
49-3 
50-3 
49-3 
49-7 
49-1 
2 
49-8 
51Y 
50-6 
49-9 
49-5 
49*4 
49-8 
50-4 
50-8 
52-0 
50-6 
50-7 
50-4 
3 
49-2 
51-2 
50-8 
49-8 
49-5 
49-4 
50-4 
51-0 
51-2 
51-9 
51-8 
51-1 
50-6 
4 
48-5 
50-6 
49-9 
49-2 
49-2 
49-1 
49-9 
50-9 
51-0 
51-5 
51-7 
51*1 
50-2 
5 
47-9 
49-4 
48-5 
47-9 
47-8 
48-0 
48-7 
49-5 
50-0 
49-7 
51-2 
50-5 
48-9 
6 
47-1 
47-5 
47-0 
47-1 
46-9 
46-9 
48-0 
48-7 
48-2 
48-3 
49-7 
49-7 
47-9 
7 
46*9 
46-8 
46-7 
46-7 
46-8 
47-7 
48-0 
48-3 
47-6 
48-1 
48-5 
49-2 
47-6 
8 
46-0 
46-4 
46-3 
46-2 
46-4 
47-2 
47-7 
47-9 
47-5 
47-4 
47-6 
48-4 
47-1 
9 
46-0 
46-1 
45-6 
46-1 
45-5 
46-4 
47-3 
47-5 
47-2 
46-9 
47-4 
48-0 
46-7 
10 
45-6 
45-4 
44-9 
45-7 
45-9 
45*7 
470 
46-8 
46-6 
46-1 
45-7 
47-7 
46-1 
11 
45-3 
45-2 
44-9 
45-1 
46-0 
44-7 
46-7 
46-9 
46-4 
45-8 
45-1 
47-9 
45-8 
Noon 
45-4 
44-9 
45-2 
45-7 
46-2 
45-9 
46-8 
46-8 
46-6 
45-6 
45-6 
46-8 
46-0 
1 
45-6 
44-9 
45-4 
45-9 
46-5 
46-8 
470 
47-0 
46-4 
45-7 
45-5 
46-2 
46-1 
2 
45-3 
45-3 
46-0 
46-1 
46-9 
46-8 
47-3 
47-4 
47-2 
45-6 
45-7 
46-5 
46-3 
3 
45-3 
45-5 
45-8 
46-1 
47-0 
47-4 
47-6 
47-8 
47-5 
46-2 
46-1 
46-4 
46-6 
4 
45-2 
45-8 
46-0 
46-8 
47-4 
47-3 
48-1 
48-0 
48-0 
46-4 
46-8 
46-6 
46-9 
5 
451 
46-4 
46-1 
46-5 
47-1 
48-2 
48-0 
47-9 
47-6 
46-8 
46-7 
46-4 
46-9 
6 
44-1 
45-4 
45-7 
46-4 
47-0 
47-7 
48-0 
47-9 
47-8 
46-8 
46-1 
46-1 
46-6 
7 
42-8 
44-1 
45-0 
46-2 
47-0 
47-6 
47-6 
47-9 
47-2 
46-1 
44-9 
44-7 
45-9 
8 
41-7 
41-9 
44-0 
45-0 
46-5 
47-7 
47-6 
47-4 
46-0 
44-1 
43-0 
430 
44-8 
9 
41-5 
40-9 
42-9 
43-6 
45-9 
470 
46-9 
46-3 
44-7 
430 
41-8 
41-8 
43-8 
10 
43°2 
41-3 
43-3 
43-4 
45-5 
46-9 
46-5 
45-4 
44-6 
43-7 
42-6 
43-1 
44-1 
11 
44-9 
43-0 
44-5 
44-1 
45-7 
46-8 
46-3 
45-2 
45-3 
45-3 
44-6 
45-3 
45-1 
Monthly 
means 
45-8 
46-0 
46-3 
46-5 
47-0 
47-4 
47-9 
47-9 
47-6 
471 
46-9 
47-3 
47-0 
The mean value of the magnetic declination for the year 1915 is E. 16° 47 /- 0. 
