TABLE IL. 
A= 0”. 375 400 -450 500 
Jan. 28, 1881 ---.9° ce Set es se 
ee 
ee 
oe 
Apr 23,4-Ma--g "7 GT ak 89 
Apr. 23, P.Mn---g 7732103 12d 
oa 
eee ee ee 
Bites cede By. MH OB ite 
eR ee a 
600 -700 ‘800 -900 1°000 
BSB ..590° 991 6.144. [108 
968: 815 299" 116 18. 
BOE A808) Ih oes 93 
141-195 91 5 47 
60° 327 188 va 
133 151 Oy 39. 
262 239-5 1775 123° 98 
171°5 180°5 122°5 895 
963 - 227-191: 12) 
oon Obi 18h). dee 96- 
963997 191 121 94 
188 198 140 80 66. 
935 235 139° 100 89 
156 197 35 698 86 
935 235 139 100 89 
vy eee ip Cs eer fe ells te, 66. 
245 59 175 2119 90 
990° 282 166 UT 80 
144. (184 «89: 64 652 
69° 6G BA 88 39: 
The next tablé gives the sun’s position, oe ra correspond- 
ing air-mass for each series in the previous 
In this table, 8 denotes the reading of the barouietes and M 
is determined from the formula 
‘0174 tabular refraction 
M= 
cos. app. altitude. 
TABLE IT. : 
Cet jee ee 
High Sun. | Low Sup. 
Date of Observation. ° 
| asee lame] ater’ | aan || gee leanne ek | ie 
Angle. | tance. (8 7) (M8. .) ‘it Angl Ae bg (8, ). (MB) 
h ° ' hm b > dm 
Jan. 28, 1881_...| 0 00 | 58 29 | 7:45 | 14.25 || 2 57 | 71 28 | 7°45 | 23°24 
te ea ee 0 09 | 57 09 | 7-39 | 13°63 || 3 00 | 70 45 | 7°39 | 22°24 
Pa 19 0 38 | 62 57 | 7-43 | 12°33 || 2 56 | 66 09 | 7°42 | 18°25 
Ayes 93s 5 0 12 | 28 13 | 7-36 | 835 || 4 36 | 66 22 | 7°36 | 18°32 
Apr. 23, A.M. ...} 0 11 | 27 49 | 740 | 8-37 || 2 45 | 45 30 | 7°40 | 10°56 
Apr. 23, P. M..... O11 | 27 49 | 7-40 | 8-37 || 4 26 | 63 57 | 740 | 16°85 
Apr. 29, A. M...-. 0 06 | 25 60 | 7°35 | 8-17 || 3.11 | 48 46 | 7°35 | 1115 
Apr. 29, P. u.....} 0 06 | 25 50| 736} 8-17 |] 6 23 | 73 36 | 7:36 | 36°73 
Ape 80 0 04 | 26 31 | 7-41 | -8-2t || 3 54 | 56 31 | T41 | 13°43 
May 28. 225014 011 | 19 031 7321 7-75 || 6 33 1 71 14 | 7°32 | 22°33 
By su 
day separately, coefficients of pune shers transmissiO 
ula 
combining the high and low 
obtained by using the form 
log ¢ = 
M,,6,,—M,8, 
log d,, —log d, 
n observations os cae 
are 
