‘ 
HEL 
Apollo; a lege of priefts facrificed by the tute 
of ss Here they obferved for more than 1000 years 
folar ye 65 
at ficopol hac He Herodotus became acquainted with the 
nees and the Egyptian mytteries. This city alfo had 
the honour of ate g Pee to Plato, and of accom- 
whilft he 
her of all her {ciences,’’ fays Savary, ‘ of all her monuments ? d. 
A Perfian barbarian overthrew her temples ; a fanatic Arab 
burnt her books ; and one olitary obelifk, railed on its ruins, 
fays to the paliéngert Here flood Heliopolis. 
This ry is ar in {cripture (Gen as 45. Ezek, 
alled PINs os in the Heb 
SUGLOMIENEONES, Thee ¥ was 5 Saother in 
optos, and the Red. fea. 
rps to him it is 
Egypt ; and he fays, the ‘Aatbian ita > = it -in 
lat. 23° 30’. Long. 61° 30’. Dapper places Heliopolis 7000 
aces E. of Cairo, and near the village of Mattarea, very 
ar from the famous Thebes. It received the name of Helio- 
polis, as it is =~ Sa having a temple dedicated to the fun, 
} okine abt fo difpofed, that it reflected 
-the rays of ie sere all day aaee and enlightened 
whole temple with great {plendour 
Onias, fon of Onias III., hav ving retired into Egyoty3 re- 
commended himfelf fo pene to Ptolemy Philometer and his 
wife Cleopatra, as to obtain permiflion to build a temple at 
Heliopolis, set: that of Jerufalem, for the ufe of the Jews 
fettled in Egyp 62.) This temple 
there. A.M. 3854, B. C. 150. 
eepemnot ts was alfo a city in cae: syria, between Li- 
banus and Antilibanus, ° Laodice d Abila; otherwife 
called Balbec, which fee 
HELIOPOL LITES Nomos, a nome or province of 
pt, E. of the Nile, between the Ue to the 
+» the Red fea and Arabia Petra to the E., e Bu- 
baitide nome. It was t 
Se a which so pear with the Nile and the Red fea 
eroopolis and Baby 
HELI IOSCOPE, in pt a fort of telefcope, peculiarly 
ed for ede and obferving the fun, without doing pre- 
judice to the e 
word is compounded of #rs0s, the fun, and cxxnlouctss 
video, Flatt I-fee, view, confider 
Heliofcopes are necefla —_ in viewing the phenomena of the 
fun, as his date eclipfes, &e. 
are various apparatufes of this kind. As coloured 
glaffes are found to diminifh the force of the fun’s rays, to 
make a heli iofcope, it is enough that both the object-glafs 
and the eye-glafs of the telefeope be of coloured ghais: the 
am, e. gr. of red, and the latter gree: 
But as there is a neceffity for the gaffes s to be very tran{- 
Parent and equally coloured, which rarely happens, He- 
Yelius chofe rather to ufe two plain-coloured aes. with 
and apphed before the eye-glafs. 
a piece Ere between, either tied or cemented — 
raverfed lengthways by aot of 
Dr. Bodke,: in an expel treatife on heliofcopes, recom- 
mends four reflecting glaffes placed in the tube: by thefe, 
he obferves, the force of the rays will be fo weakened, as 
only to ftrike the eye with a 256th et of their force ; and 
this “eta he prefers to all other 
M. Huygens’s method is much alee he only blackens 
the infide of 0 eye-glafs of the telefcope, by yess ae it 
moke of a lamp o 
-” yaemere en blackens a piece of plain glafs, and 
the bet of all, joins the {moked glafs to another, witha rim 
of thick paper between, to keep the black from ephee: se 
and fits the two into a cell or frame ; to be applied be 
the eye and the eye-glafs. 
septate ete le rv, ig and } wig fer 
name of a ment invented by Dr. 
fande, Pe sham: called; lasms its propesty “4 tee the etd 
beam in one pofition, wz. in a horizontal direétion, acrofs. 
the dark chamber whillt it is afed. 
This i maton, or piece of clock-work, ye 
of the followi ng api AA (Plate VI. Cote, I.) 18° 
metalline {peculum § is 
» B 
On the back part of the fpeculum is fixed a long a 
ic wire, or tail D E, ina perpendicular potition. By thi 
it is connected to the fecond part of the helioftata, which.i is 
a common twenty-four ho hour clock, reprefented at ut 
lane of which clock is parallel to that of the equator in any 
ock is fuftained on the column F G, 
pt that enters it as a cafe, and fixed to a proper heig' 
by the fcrews d, d, at the fide. ‘The whole is truly adjuited 
to a perpendicular fituation by means of the three pices 
I, 1,1, in the tripod LLM, and the gls ummet Q, w 
cufpis mult anes to the point o beneat 
. The axis of t » which moves is index N oO over 
the hour-circle, is A sats large, and perforated a 
cylindric cavity verging a ittle to a conical figure ; and 
receives the fhank pg of the faid index N O very clofe and 
tight, that by its motion the index may be carried round. 
In the extremity O of the index is a {mall cylindric piece my. 
: mit 
of the fork are feveral holes exa¢tly oppofite to each other, 
n which go the ferews r, r, upon whofe fmooth cylindric 
als moves the tubular piece R on its auricles m, m. 
hen the machine is to. be fixed for ufe, another part is: 
made ufe of to adjuft it ; which is called the poftor, and is: 
denoted by the nein VXYZ. The cylinder C is 
with the fpeculum from the foot P, ca the brafs. 
tl V X put on in its flead, and adheres more ftriétly 
tothe pin ¢, that it may keep its Saito while the machine 
is conftituted. 
On the top of the column, about X as a centre, moves 
the lever Y Z, fo that it may be any-how inclined to the 
horizon, and keep its pohtion. The arm YZ may be of 
any length at pleafure, but the arm Y Zis of a peculiar con- 
ftru€tion, and of a determinate length, To this this arm, o seb 
extends no farther than 7, ie adapted a fliding-piece e Lx 
-pointed at Z. By this the arm X Z is determin 
a given length, the ag Zx a fixed by the ferev 
Upon this arm *he darren brea 
