ie oe 
for computing the Astronomic Refraction. 27 
those that belong to very low altitudes as they are materially 
affected by other considerations they will be as follows: 
Therm. Values of 2. 
———E 
32° 3°74129 
34 3°59582 
36 3°70809 
36 3°65835 
37 3°63439 
39 3°64778 : 
39 3°21379. .\* 
40 362402 
AQ) 3°62441 
40 3°65160 
42 3°64000 
43 363706 
434 | 362255 
53 3°63505 
53 3716032 * 
54 3°35247 
55 3:61333 
57 3°49971 
59 3:54668 
60 3:54576 
61 3:61064 
62 3°55849 
At 32°? the value of mis .. = sis 3-74129 
32 to 40 omitting the last 3 whe 3:66345 
From 32 to 40 including the last 39 we 3°99922 
40 to43}$  «- oe ik ve 3°63327 
53 to 60 omitting the second 53. 3°52945 
53 to 60 including the second 93 3°46793 
60 to62 . .. r {te ee 357163 
A slight examination of the above values of ” will convince 
us that there is an evident change from 32° to 60°. Now if in 
the preceding formula we omit the part 
x(t) 
or consider it as being constant; and take only the remaining 
part of the expression, viz. 
, (ZD=nr) * (57): or, 
