LIEUT. CLERK’S REPORT: ELEMENTS OF REDUCTION. 
369 
with the series by Lieut. Dayman, the weights of two grains and three grains having 
been observed daily ; the following observations with weights made at the observa- 
tory, Hobarton, give the formulae for calculation : — 
(I.) 
Lieut. Smith’s. 
C 2 grains v— 10 33 ; I=r80; I'i=='3296 cosec v'. 
X 3 grains v=z 16 05; 1=1-80: I' = -4987 cosec v'. 
(II.) Lieut. Dayman’s. 
1 grain t>= 5 19" 
2 grains i; = 10 35 
3 grains v= 16 20 
4 grains v— 21 50 
5 grains t>=2 7 41 
_6 grains v=34 08.. 
From these we obtain the following 
values of v for 2 and 3 grains ; viz. — 
o / 
for 2 grains v—\0 43. 
for 3 grains v— 16 11. 
Hence for 2 grains I' = -3347 cosec v'. 
for 3 grains I'= *50 1 7 cosec v'. 
“ In correcting these observations the same plan has been pursued as with the dip 
observations. As Lieut. Smith’s observations required no correction in the latter 
case, so none has been applied to the intensities ; and Lieut. Dayman’s have been 
corrected from the same table as was used for the ‘Pagoda’ observations. No 
corrections have been applied for the effect of temperature ; but they are probably 
so small as not to affect the results.” 
