ne? 
‘about ee thread-fhaped, fhorter than the corolla § anthers 
Tinear, erect. Pif?. Germen roundifh3 ftyle thick, as long 
‘as the ftamens ; iligma in feven deep, channelled, fpreaidin ing 
fegments. Peric. Berry roundih, of feven cells, with many 
feeds. Sveds roundith. 
There are flowers deflitute of a piftil, found ona feparate ; 
plant. 
Eff. Ch. Calyx of as leaves. Petals ten. 
feven cells, with many fee ome flowers male. 
~H. africana, the Silly” fpecies, found in woods on the 
‘atten Et of Africx, near Mofambique, where it is 
Berry of 
called Mu ca A final tree, with fpreading branches. 
Leaves alternate, bers ovate, entire, veiny, fmooth. 
Fhwers white, many-flowered, lateral ftalks, Berry 
green, ie tched t in di rameter 
As no account is given of the fituation of the germen, or 
infertion of the ftamens, we can neither determine the arti- 
cial nor natur I clafs of this plant. It is one of the good 
Father Loureiro’ s botanical riddles, which we cannot guefs, LyG 
and may be a genus entirely unknown to other botaniits. 
Poflibly it may belong to the natural order of Myrti, the 
author having miftaken a coloured calyx for five of the petals, 
and braéteas at the befe of the germen for a calyx of three 
Teaves ; at leaft we can fuggeft nothing better. 
HEPTACH HORD, of ixrz, feveny and yop lny chord 
in the Ancient Mu fh t. He aang was applied, according 
to the etymology h lyre, when it had but 
tes ee aad is igen faid o any in{trument that has 
tremes. “See es Il. 
In the z anclemeste y, it fignified sociii that were fung or 
played on feven or founds, pee probably on 
an inftrument with feven Rrings. See Lyr 
Hepracno ord, Major, is the a pet or fharp- 
th, an interval whofe ratio is = 5552 + 11 f 
+ 48 m. .See Major Seventy 
Herracnorp, Minor, ist thie « minor feventh, SP grener of 
the flat fevenths, an seed econ ratio is § = 519 2 + 
See Minor SrvEN 
F £0) FA 2 
EPTACHORD, Minor, of Galileo, is the minor peventts or 2 
ratio is, = i 
leffer = — flat fevenths an inten whofe 
5 of + 44 yr SEVENTH 
HEPrACoM® ET A, j in pie Gegraply a people who 
inhabited Be coat of ee Exexine fea, and who ordi 
trabo, ended 
felves tb the 
all 
 . a 
ah The area ape ea on is = 
One of its Sian multiplied by 3. 6339126, or = the aul te 
of the fide m multiplied mths where f denotes the tan t 
of the angle line drawn from the centre to either 
gars andr” Fr ol 
ng it, Po. 
FS ele a a ee 
ions 8 
_HEPTAGONAL Nunskis, eee Kiecot mate 
Vou. XVII, 
HEP 
numbers, in which the ne of the terms of the eorres 
{ponding arithmetical progre is five ; thus, 
Arithmeticals, 1, 6, 11, om #8; 26, &e. 
Festagasan, 1, 7, 18, 34) 55 
81, &e. 
where the heptagonals are for by continually mi 
the terms of the arithmeticals, above them, whofe co 
difference is 5. 
One pro perty, among others, of thefe numbers, is, that if 
any one of them be multiplied by 40, andg be added to the 
produét, the fum is always a fquare number ; thus 
IX 40+9= = 7 
7x 40+9= 289= 17" 
18 xX 40-+9= 729 = 27° 
X 40+ 9 = 1369 = 37°, Kc. Ke. 
34 
weet it is remarkable that the feries of {quares thus formed 
»27',37 » &c. the common difference of whofe roots 
ae Sejm which the heptagonals are formed. 
HEPTAGYNIA, in peter, from in'lx, feven, and 5 wr, 
@ female, the name of fach ders in the principal claffes of 
the Linnzan fyftem, as are Guratleteed by feven flyles in 
each flower, or where - eer Aig are wanting, feven feffile 
igmas. It is an order rare occurrence, and is en- 
tirely unknown to the Britith Flora ; indeed we meet with it 
no where but in the feventh clafs, where this order was 
formed to admit the genus Septas, the pncertainty of which 
is mentioned under the article HepranpRia 
HEPTAMERIDE, from : LTT seven, and viplcs a party 
in Mufic, is one of the intervals in the fy ent of M. Sauveur, 
(Mem. de l'Acad. des Se. 1701; wie ridgs the o¢tave 
into 40 parts, which he calls merides.3 then each of thefe into 
feven heptamerides ; fo that the w étave iy. es s 
301 heptamers Sy which he ftill divides. See eaneeeear IDE 
003 g= : eagebins; 
185374 of a tna comma. Dr. Bufby, 
Mu 
longing to the ancient mufic ; we are ot a ware, ited of 
its ufe more than a century ago, w nie into 
duced it in his logarithmic tempered ivkaks we all the 
— of which the a. were unacquainted, as far 
. HEPTA A AME RON, 2 ten sespearel implying iy days 3 
bei cing compoun of ixtay f and rue, diy. 
It is chtefly ufed asa bore of certain books, the 
, ee of feven d 
The hep 
56 
ameron of “Margaret & Valois, fitter to Francis 
EE of France, and queen of Navarre, is a it ingenious 
piece, in the manner r of Boccace’s Decame 
HEPTANDRIA, in Botany, from ixiz, fom, se mney 
a man, the feventh clafs of the fexual or artificial fyft em of 
Linnzus, confifting of plants with feven feparate or difting 
ftamens, in the fame a sigs the be pit or piftils. 
{mall eats inclu 
ribes with fom 
as being the ee the firft plant he found i in that region with 
that it ferved to complete the uniformity of he aE : 
The horfe chefnut alfo belongs to this order, and mo. 
rn writers have removed feveral genera to it ;—Dig: mia, Of 
which Limeum, an A <gen —_ is the ouly ee mak i 
Wagy tide 
. 
