TOTAL SOLAE ECLIPSE OE JULY 18, 1860. 
347 
Applying the average daily losing rate of 12-51 sec, since July 3rd, 21 h. 24 min. for 
Leplastrier, we derive the following results from the observations made with that chro- 
nometer : — 
.July 14 
July 20 
Leplastrier No. 2915 
Was fast of local 
sidereal time. 
h m m sec. 
16 47 11 1-7 
8 0 9 55-8 
Error on Greenwich sidereal time 
by applying mean daily rate, 
m sec. 
Slow 0 37-9 
Slow 1 48-4 
whence the longitude was West of Greenwich 
July 
14 . , 
m 
. 11 
sec. 
39-6 
July 
20 . , 
. 11 
44-2 
Mean 
. 11 
41-9 
By combining all the foregoing results, and taking the arithmetical mean, we obtain for 
my Observatory at Rivabellosa 
m sec. 
11 43-7 
11 42-4 
11 41-9 
the longitude West 11 42-7 
Observations for Latitude. 
July 12. The reduced zenith distance of the sun’s upper limb, when on the meridian, 
gave as the latitude of Kivabellosa 
N. 42° 42' 37" 
July 13. An observation of a Lyras on the meridian and of Polaris out of the meri- 
dian, when reduced, gave for the latitude freed from error of the level, 
N. 42° 42' 19". 
July 14. An observation of the zenith distance of the sun’s upper limb previous to 
the meridian passage at the hour angle 24° 5' 15" gave, when reduced, the latitude 
N. 42° 41' 48". 
July 20, The reduced zenith distance of the sun’s upper limb, when on the meridian, 
gave the latitude 
N. 42° 41' 17". 
Combining the foregoing determinations of latitude, we obtain 
.July 12. Observations of sun 42 42 37 
July 13. Observations of stars 42 42 19 
July 14. Observations of sun 42 41 48 
.July 20, Observations of sun 42 41 17 
Latitude N. 42 42 
as the mean 
