GO 
MR. F. C. PENROSE ON THE ORIENTATION OF CERTAIN 
PcesfAim .— Latitude 40° 25' 0". 
Name of temple. 
Orientation 
Stellar 
Solar 
Name of 
angle. 
elements. 
elements. 
star. 
Temple of Nep- 
273° 9' 
A 
Amplitude of star 
+ 1° 30' W. 
- 3^ 9' E. 
Spica, 
tnue 
or sun 
settinsT 
B 
Corresponding alti- 
3^ 
5° 20' 
tude 
C 
Declination . 
+ 3° o' 
+ 1° 4' 
1 ) 
Hour angles . 
5'“ 55"' 
yli Ora 
E 
Depression of sun 
, • 
ir 
when star heliacal 
F 
R. A. 
IF' 13“ 
oil 10“ 
G 
Approximate date . 
535 B.C., 
]\larch 22-23 
The star could have been well seen setting with less solar depression : had this been 
calculated at 10°, the date would be 400 n.c,, which is archaeologically impossible. 
The only effect of the deeper depression would be to add about live minutes to the 
time given for preparation, 
Pompeii .—Latitude 40° 45'. 
Here there are two temples which can be referred to the Greek period. Of one, 
namely, that occupying part of the Triangular Forum, little remains but the 
foundation, but it was evidently a Greek Doric temple. 
i 
Name of temple, i Oi'i^ntation • 
i 
i 
Stellar 
elements. 
Solar 
elements. 
Name of 
star. 
1 
Temple in -301° 1' 
A 
Amplitude of star 
-20° 51'E. 
— 2.S° .32' E. 
Antarcs, 
the Triangular 
or sun 
1 
rising' 1 
Forum ! 
B 
Corresponding alti- 
4° 40' 
4° 12' 
i 
tnde 
1 
C 
Declination . 
-16° 44' 
-18° 15' ' 
t 
D 
Hour angles . 
4'‘ OS'" 
5'' 50'" 
1 
E 
Dep’.’ession of sun 
10 ° 
when star heliacal 
F 
R.A. 
13'* 56'" 
15'' 14'" 
G 
Ai)proximate date . 
640 B.c.. 
Nov. 12 1 
The other is the 'I'emple of Isis, which seems to have been repaired, and probably 
considerably altered in external appearance during the interval which occurred 
between the earthquake, in a.d. 63, and the eruption of Vesuvius, in a.d. 70. 
A very noticeable point is that originally a large window-opening had been formed 
in the north-eastern inclosing wall of the Temenos, opposite the axis of the temple ; 
which could have had no other purpose than that of permitting the rising sun 
to shine into the sanctuary. This opening, however, had been filled up with brick- 
