166 
Attempt to facilitate Observations of 
TABLE I.— Containing Observations of the positions of the Common and Coun- 
terpoised Needle, at places differing from one another in Dip. 
Observatory, Armagh, Sept. 16. 
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Dundonnell, County of Down, Sept. 23. 
3 3 - E marked side WwW E marked side WwW 
8 35 aS SS SSS SS —“—_ 
2 N s Ain s N s N s 
cn aale \" Tee We aI Ga il bar (BO YE Oe (aS aoe 
3 bad 71 ile aa A ae aii eirsi la SOM cpa) 
a sf 270. “Yo. 2 Ts” 2 “ee yi 5 7 OF” ONeeeee 
3S | 
Z tefl bas iLO | 71 710) ey 5 71 20 71 #15 | TL 22, a es 
Mean | 71 43 WL (3¥.2)|ial ale 7 oeeon| 71 avo V1) 36:5 | (#1, ATS 7 40 
Final mean = 71° 39’.7 Final mean = 71° 39’ 
§ 2.2 E marked side WwW E marked side WwW 
eI aie (as SS (SS SSS) SS 
oS own s N s N s N S 
=) gE |~21° 20 =21° 15 | 22° 10°—22° 7 |~21°10 -—21° | —22° 50’—22° 50 
salt > i =21 25 —21 15 |—22 5-21.55 |-22 0 —21 55 | —22 52-22 45 
a io 
a pn |+22 380 +22 30 | +25 40425 35 |+22 5 +22 5 | +25 15425 20 
a ny | +22 0 +22 5 | +23 45423 45 }+22 7 422 7 | +24 40424 40 
Mean |. & = — 21° 41.5 Yo 4008" ese) \@ 922° 4 = 423722! 
Calculated dip = 71° 26’ Calculated dip = 71° 38’ 
Museum, Belfast, Sept. 28. Garden, Trinity College, Oct. 21. 
3 mate E marked side Ww E marked side Ww 
ES BE caicadnnina paws ss SS) 
SA N s N Ss N Ss N s 
st ra 72 20 We (22 | 72 15 72 415 71 16 epi Ns) | 71 LO 7 Lae 
A “Une 71 30 71 25 | W380" eI 2s8 70 43 70 35 |70 33 70 30 
a 5F 72 #415 72 20 | 72 LOY W742 15 7A UG) 7 201 18) ieee 
“Vy 7 3 7 37 | 71 30 71 20 | 70 36 70 34 | 70 35 70 32 
Mean 71 do 71 56 | 71 51.2 71 49.5 | 70 57.5 70 58 | 70 54 70 56.2 
Final mean = 71° 52’.9 Final.mean = 70° 56.4 
A 2.9 E marked side WwW E marked side Ww 
50.8 SS aw) Tae meD. a ae 
gy Ns S N s N s N s 
5 E |—21° 10'—21° O | —21° 45'21° 35’ |—23° 27' _23° 30° | —23° 42/—23° 41! 
a : 
5 : se = 22.7 92 AF Vi 82 87-92 Sols 16 =/94) 17. | —2515 a7 ee oneee 
S| 
2 gE |+22 40 +22 40 | +25 30+25 35 |420 27 +20 27 | +21 40+421 43 | 
uf +22 52 422 45 | +25 30+25 40 |+19 52 +19 52 | +22 37422 32 
Mean | %= ~ 21° 51’ o” = +24 9 d'= + 24° 91.2 6’=+21° 81.8 
Calculated dip = 71° 49 Calculated dip=71° 12’ 
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