158) J. H. Lefroy on the Aurora Borealis of 1850-1851. | 
Taste IIL. ta ag vagy arranged according to position of Station with reference to 
the Monet ete Lhe © Aoutes under the heading Proportion, shew the per-cent- 
age of ob on of Aurora, to Mia Hee on which Ree appear to have been 
possible, as pr vapards the shite of the 
(a) In first circle, from 500 to 1000 4(4) In second circle, from 1200 to 1500 
miles distant. miles distant. 
-j43¢ ,)2S\8. 185 »gée| sia 8../82 
£3 |C ES SE Sel Soe en fs s/o b< 138 Sessa] ee 
“a |g 2's |ZE\EB\Se8 FR ciges | se SEC ael ee 
January, 1} @ [e-0h49| 1B. T1671) 9 | 2 | 1971 
February Bi 12 [33 02 )-5 J... .f 80) Sr ee 
MOOR, hoses cel RP Seca) 10 FO? fT 98 Pe eh ee eee 
RING ike TO 13] 17 2410 fers 1 OE ee 
AY 5. Sis vce ee 0 24 Aa fac 1 1 1 | 14] 16 
June, reé 1 3 | 231-10 3118; 7 | 59 
uly,.... Re Ree ; : 34:19¢-}° 110} BF 
August, zy ue é 9} 20d | ke eolep Boe 
September, 1| sf |....| 9|..../100] 3} 17d | 1] 7} 6 | 74 
October, Sie (6-H ii1 4 | 700 44-19° "te. O) 8 Pe 
November,.....| 4 | 25 sets 1 984 44-16 1| 9} 6 | 79 
Decemb coun 49 98 os Sl Bt et P4116 1 (10) 5 | 76 
1851 é } 
ee St @6 ol ep Ried P86 £4 1 15 11} 6 | 79 
ebruary,...... ea Ps a es ee a ae ee 2 | 89 
Minted cies be suds) S428 | Seca As) 1B BE Ad, Qboche voke, 4en8le IS 
io Sie 4e| 23 |., Ql. 6 1 89-0 Y |: 9 1. a et 1B 
May, ey Btls cs Or Pee? ee is ee 
June oop. Coen ARIES, 2 $d Be oalOp aes pe 
SRY, < . tixese bait coos Liseibeepl eubacheia fed oh  SCi ls enh dSh le die 
(a) Down to the 19th May. Th Fort § on in May, that 
is to say, twilight lasts froin sunset to sanrine. “(by R ae trite Pactere beeing a 17th 
June. (c) Including Mr. Anderson's observations en pri (d) No observations yoo at t Michi- 
picoton from ot. August to 20th Septembe an ‘ene probably tov c) 
4 stations up to the 10th, from 14th to the end, only 2. (7) Register from 2d to 18th fh Beptember 
In the third Seon (c) or stations from 1600 to 2000 miles from the Magnetic Pole. 
Taste IlT—( Continued.) 
i 4o48, 1849. 1850. 1851. 
Selgc| €fehlag| ¢ fesizel ¢ feil2e|2{t 
63 lag] 2 ee lea) 2 [82 22] 2182 lez] Se 
Celsl) 5 158)S2) 2 iSeiso| 2 [Sei se) 2 fe 
ZBiS4S|) 8 [Ze i<tle fae liesia fzei<s| & Is 
January, ST STE ote on 67 4) 98 8 |, 81 eek 
February, .} 13] 1/14} 17 |...) 17113) 6] 90f 7] 6} 18 
March,....) 18 | 1} 14}11) &| 264-124 10 | 924.15 }.4| 20 
Agkily. +00 |.27.4. sie TEE 20 2) 998 48) 5 lak ist 2 ae 
RS 11710; 7/17/10! 3} 1sf 9{ 6} 14 
June, veeel 6 [2.03] ° OF 8 pS) ae PA eee es Se 
ag. 4 ere ; 9} 1) 10f12) 6) isfaz | 4)orp 7) 6) 28 
August,...| 6| 3] 9 6; 14815! 4/3189 8| 8/11 
September,} 7 j.... 7) 19161 37199124 6) 18 
October, ..} 14} 1] 15)124 2) 14441 41-182 12.}--1-).18 
November, | 10 |....) 10112 | 2]14715| 3/18 61... 
ber, | 12} 1] 53 “£1 40D 38) 2 Pisses Tse 
126 ! 11 137 | 44 154 | 51 | 114 
: ont! 
then haber ~ ‘of hours los one, fain are bei by divs by dividing the ave Trin cinafh ee ite ro 
the 15th of that month; they. shew i a striking mesa the a ee tent of Soe 18 
nreaeieas shane the winter solstice, and eg oe development 
turns for the last three months of ” got are : all collected. pie 
