436 
APPENDIX NO. XVI. 
Hourly Changes of Magnetic Declination — Continued. 
Mean 
Time. 
January 24-25. 
January 27-28. 
January 31-February 1. 
Scale Readings. 
Difference. 
Seale Readings. 
Difference. 
Scale Readings. 
Difference. 
h. 
,5 
316*53 
+20*31 
314*00 
+29*29 
333*75 
+28*31 
'6 
345*75 
— 8*89 
306*50 
+36*79 
322*05 
+ 40-01 
7 
358*25 
—21*39 
824*90 
+18*39 
350*45 
+11*61 
8 
367*70 
—30*84 
324*00 
+19-29 
361*50 
+ 0*56 
9 
361*20 
—24*34 
325*50 
+17*79 
37P05 
— 8*99 
10 
362*10 
—25*24 
322*77 
+20*52 
872*30 
—10*24 
11 
356*90 
—20*U4 
324*28 
+19*01 
368*30 
— 0*24 
12 
35S-95 
—22*09 
330*08 
+13*21 
374*90 
—12-84 
13 
354*15 
—17*29 
335*44 
+ 7*85 
374*50 
—12-44 
14 
364*50 
—27*64 
333*24 
+1005 
380*00 
—18*54 
15 
357*38 
—20*52 
339*90 
+ 3*39 
381*90 
—19*84 
16 
344*85 
— 7*99 
347*50 
— 4-21 
368*65 
— 6*59 
17 
342*70 
— 5*84 
353*10 
— 9*81 
374*40 
—12*33 
18 
338*80 
— 1*94 
383-S0 
—40*51 
374*35 
—12*29 
19 
345*90 
— 9*04 
3S2-40 
—39*11 
387*40 
—12*34 
20 
348*30 
—11*44 
365-43 
—22*14 
387’SS 
—25*82 
21 
316*85 
+20*01 
362*20 
—18*91 
383*05 
—20-99 
22 
296*95 
+39*91 
360*40 
—17*11 
327*30 
-414*76 
23 
315*50 
+21*36 
363*30 
—20-01 
327*65 
+34*41 
0 
311*70 
+25*16 
345*65 
— 2*36 
325*15 
+36*91 
1 
291*90 
+44*96 
338*70 
+ 4-59 
336*75 
+25-31 
2 
301*30 
+35*56 
356*70 
—13-41 
372*50 
—10*44 
3 
312*65 
+24*21 
— 5-31 
355*50 
+ 6-56 
4 
313*91 
+22*95 
350*60 
— 7*31 
377*50 
—15*44 
Mean 
333*86 
343*29 
362*06 
Mean 
Time. 
February 3-4. 
Mean 
Time. 
February 7-8. 
February 10-11. 
Scale Readings. 
Scale Readings. 
Difference. 
Scale Readings. 
Difference. 
Difference. 
h. 
9 
362*60 
— 4*31 
315*75 
+17*01 
2S6-90 
+ 50*26 
10 
369*90 
—11*61 
( 
321*30 
+11*46 
350*20 
— 13*04 
11 
373*32 
—15*03 
7 
340*90 
— 8*14 
362*35 
— 25*19 
12 
396*30 
—38*01 
£ 
349*70 
—16*94 
379*00 
— 41*84 
13 
405*90 
—47*61 
9 
356*35 
—23*59 
392*42 
— 55*28 
14 
431*10 
—72*81 
10 
35*1*60 
—21*84 
384*00 
— 46*84 
15 
412*50 
—54*21 
11 
368*90 
—36*14 
378*10 
— 40*94 
16 
395*25 
—36*96 
12 
371*50 
—38*74 
382*60 
— 45*44 
17 
401*70 
—43*41 
13 
371*50 
—38*74 
390*20 
— 53*04 
18 
381*40 
—23*11 
14 
389*56 
—36*74 
402*50 
— 65*34 
19 
3G0-55 
— 2*26 
15 
381*10 
—48*34 
457*25 
— 20*09 
20 
311*62 
4-46*07 
16 
348*60 
—15*84 
483-80 
— 46-64 
21 
266*15 
+92*14 
17 
335*90 
— 3*14 
392*40 
— 55*24 
22 
293*90 
+64*39 
18 
315*10 
+17*66 
363*70 
— 26*54 
23 
345*90 
+12*39 
19 
291*50 
+41*26 
321*85 
+ 15*31 
0 
332*30 
+25*99 
20 
277*70 
+55*06 
265*40 
+ 71*76 
1 
336*50 
+21*79 
. 
302*00 
+30*76 
271*20 
+ 65*96 
2 
341*60 
+16*69 
22 
303*40 
+29*36 
245*20 
+ 91*96 
3 
313*70 
+44*59 
2. 
299-S0 
+32*96 
205*10 
+132*06 
4 
301*30 
+56*99 
0 
321*30 
+ 11*46 
209*90 
+127*26 
5 
353-SO 
+ 4*49 
1 
308*50 
+24*26 
202*80 
+ 134*36 
6 
361*30 
— 3*01 
2 
333*50 
— 0*74 
271*10 
+ 66*06 
7 
375*10 
—16*81 
4 
308*25 
+24*51 
331*30 
+ 5*86 
8 
375*30 
—17.01 
1 
319*00 
+13*16 
362*50 
— 25*44 
Mean 
358*29 
I 
332*76 
337*16 
