APPENDIX NO. XVI. 
437 
Hourly Changes of Magnetic Declination — Concluded. 
Mean 
February 14-15. 
February 17-18. 
February 21-22. 
Scale Headings. 
Difference. 
Scale Readings 
Difference. 
Scale Readings. 
Difference. 
h. 
5 
306*70 
+ 54-76 
181-80 
+47*00 
204*90 
+ 6-18 
6 
345*80 
+ 16*66 
189*00 
+37*20 
254-70 
+16-38 
7 
375*40 
— 13*94 
259*70 
—32-90 
265-40 
+ 5-68 
8 
418-10 
— 56-01 
243-40 
—16*150 
281-00 
— 9-92 
9 
421*50 
— 60-04 
216*00 
—19-20 
301*90 
—30-82 
10 
469-40 
—107-94 
272-00 
— 45-20 
289-00 
—17*92 
11 
444*90 
— 83-44 
267*05 
—40-25 
277-60 
— 6-52 
12 
479-50 
—118-04 
230*85 
—10-05 
293*40 
—22 32 
13 
414-70 
— 53-24 
234-6S 
— 7*88 
2S4-60 
—13-52 
14 
451-90 
— 90-44 
247-90 
—21-10 
236-20 
—15-12 
15 
457-50 
— 96-04 
238-35 
—11-55 
2S2-40 
—11-32 
16 
489-90 
—128-44 
236*40 
— 9-00 
291*30 
—20-22 
17 
454*90 
— 93*44 
242-90 
—16-10 
292*30 
—21-22 
18 
409-30 
— 47*81- 
229-30 
— 2-50 
272*50 
— 1*42 
19 
380-00 
— 18*54 
233-70 
— 6-90 
25S-50 
+12-58 
20 
335*80 
+ 25*61 
197-00 
+29-80 
261-95 
+ 9-13 
21 
344*30 
+ 17*16 
216*40 
+10-40 
231*50 
+39*58 
22 
292-90 
4- 68-56 
222-80 
+ 4-00 
222-00 
+49-08 
23 
249-70 
4-111*76 
245-55 
—18-75 
256*20 
+14*88 
0 
174*70 
4-186*76 
234*95 
— 8*15 
260*90 
+10*18 
1 
173*90 
4-187*56 
220-00 
+ 0-80 
262*00 
+ 908 
2 
245-80 
4-115*66 
208*20 
+18-00 
259-00 
+12-08 
3 
245*40 
+ 116-04 
154*95 
+71*85 
271*60 
— 0*52 
4 
293-10 
+ 68*36 
177*00 
+49-20 
285-00 
—13-92 
Mean 
361*46 
226-80 
271-08 
Mean 
February 23-March 1. 
March 3-4. 
March 7-8. 
Time. 
Scale Readings. 
Difference. 
Scale Readings. | 
Difference. 
Scale Readings. 
Difference. 
h. 
5 
200*6 
+110*7 
246-6 
— 4*56 
220-8 
+53-13 
6 
189*5 
+121-8 
274-2 
— 32-16 
255-8 
+18-13 
7 
217*4 
+ 93*9 
280-8 
— 38-76 
266-7 
+ 7*23 
8 
260-2 
+ 51*1 
318*9 
— 7G-S6 
277-1 
— 3-17 
9 
328*2 
— 10*9 
338-9 
— 90*86 
299-5 
—25-57 
10 
300*6 
— 49-3 
276-8 
— 31-76 
292-6 
—18-67 
11 
391*9 
— 80-6 
279*4 
— 37*36 
280*5 
— 6'57 
12 
407*0 
— 95-7 
309*8 
— 67-76 
270-4 
+ 3*53 
13 
443*1 
—131*8 
312*8 
—100-76 
285*4 
—11*47 
14 
354*7 
— 43*4 
312*2 
— 70-16 
288*6 
—14*67 
15 
337*9 
— 20-6 
287-1 
— 45-06 
287*7* 
—13*77 
16 
323*8 
— 12-5 
280-0 
— 37-96 
286*8* 
—12-87 
17 
343*7 
— 32-4 
258-5 
— 16-46 
285-8 
—11*87 
18 
320-8 
— 9*5 
234*85 
+ 7-19 
291*7 
— 17*77 
19 
316*3 
— 5-3 
148*8 
+ 93*24 
202*3 
+11-63 
20 
311-6 
— *3 
199*1 
+ 42-94 
269*6 
+ 4-33 
21 
302*1 
+ 9-2 
176-6 
+ 65*44 
271*4 
+ 2-53 
22 
298*6 
+ 12-7 
185-9 
+ 56-14 
285*4 
—11*47 
23 
279*4 
+ 31*9 
155*7 
+ S6-34 
273*4 
+ *53 
0 
331*3 
— 20-0 
156-3 
+ 85*74 
283*5 
— 9*57 
1 
314*4 
— 3*1 
170-4 
+ 71*61 
249-7 
+21-23 
2 
263*6 
+ 47-7 
175-9 
+ 66-14 
251*9 
- L 22*03 
3 
269-1 
+ 42-2 
191-8 
+ 50*24 
271*7 
+ 2*23 
4 
305*5 
+ 5*8 
207-7 
+ 34*34 
2G0-0 
+ 7-93 
Mean 
311*3 
242-04 
273-93 
* Those two numbers were supplied by interpolation. 
