DEF 
was likewife the fame of a wood, where part was enclofed 
and fenced up to fecure the growth of the underwood from 
the j ey of cattle. 
DETEN SOR. ee Any 
DEFERENS Vas, in Aratony ie tube which conveys 
the femen from. the epididymis to the urethra. It afcends 
along the back of the (hoe chord, enters the abdomen 
the ab‘ominal ring, takes its courfe fubf f.quently over 
the fide aad under part of the bladder, and tien penetrates 
= proftate giar - ~ urcthra. Tor a further account of 
t, fee CenzRATION, Organs 0 
D SFERENT, o or DEFEREN s, in the Ancient Aflronomy, 
acirc:e invented to account for the eccentricity, perigee, 
and pace of the plan 
st 
mieten 
y the eeu ot of ‘the other planets in a 
aa called ioe. 
the Ptolemaic fyftem, the fame deferent ts alfo called 
the een of the epicycle ; aed it traverfes the centre 
of the epicycle, and feems to fuftain i 
DEFERTINES, in Geography, a ‘fmall town of ne 
in the department of the Aiher, three miles N. E. of Mont- 
lugon. 
*DEFESCH, i in eee ae a German mufical compofer 
and performer on the vio who came to England about 
173y, and frequently led a band at Marybone. He was 
a good lee tance and a voluminous aa but his pro- 
ductions were in general dry and unintere 
3. Clive, a a ronal and baitle 
with er. Arne, be- 
hina te {cenes of Drury-lane theatre, would perform none 
of the do€tor’s mufic; and when he had new fet the Tempeft, 
and prepared for hee his charming air in the part of Ariel, 
*¢ Where the bee fucks,”’ fhe refufed to fing it, cade employ- 
ed D<-fefchto fet the fame words, and whateverelfe fhe had 
to perform in all her parts, which was a greater lofs to the 
_ public, than difgrace to Dr. Arne, who was as fuperior to 
"“Mingotti was to ponte in ae art of 
t fo little do we know our own pow that 
though fhe was a moft admirable ine original sey in n fach 
comic parts as Neil in «© The Devil to Pay,”? and Mrs. Hei- 
delberg, in the ‘* Clandeftine Marriage,’? fhe never was fo 
happy as when fhe played lady Townley, and was attempt- 
ing : fing as alee Teale fongs : 
oice, 0 wle 
ree been lefs dull | than as ufually were, ear would never 
have been {ung into baa favour by = 
DEFIANCE. ae HALLEN 
DEFIANCE, in Cong 
a bagcer ey fort Wayne on the Miaini, and lake 
° 41’, W. long, 84° 43/.. 
‘DEFICIEN! i pean in Mu/ic, is pate ad an inter- 
val iefs than the true bya mma. See 
Dericisnt Numbers, are fuch whofe ae aed toge- 
ther make lefs than ie cles whofe parts they are. See 
NuMBER, ; 
e. gr. is 8; whofe quota parts are I, 2, and 4; 
which, together, only make 7. See Anunpant Number. 
DEF 
Dericient FHyperbola is a curve of that “dene minations 
having athe one afymptote, and two hyperbolic legs epanine 
ae ons i towards ha ide of the Ba kgl e but con 
tra (See Curve.) This name was given tot rhe 
curve on Newton in bis a Pameate Li inearum fertil ore 
Of thefe there are 6 different fpecies. which have 
no diameters. exprefl ffed by the equasion x yy ++ ey = ax 
+ b6xt tex + d, the term ae being yee 
the equation ax* = bx3 4 cx? +dx + Bechas ail its 
equal, ia curv e has an a joined to it. 
When the two middle r 
ery acute cufp or point. When, of three roots with the 
fame fign, the two greateft are “7 1al, the oval vanifhes into 
y two ro 
ood fp any oval, 
cufp, or conjugate ee and w 
wanting, it is of the 6th {pecics. There a alfo 7 different 
fpecies of thefe curves, having each one diameter, expreffed 
y the above equation, when the term ey is wanting, accord- 
ing to the various Pear s of the roots of the equation ax 
=bw ten t+ sto coe rity, se wek their having 
the bie figns, or tw wo oa th aginary. 
EFILE, in the Militar y  Aecsain is a harrow way o 
path, admitting only of a few perfons (fometimes indeed 
only one) proceeding a-break ; a diay ferving as the 
at through wilderneffes, mountainous countries, &c. The 
term is derived from the thread given by Ariadne to Thefeus 
hae he entered the celebrated labyrinth 7 Dedalus, king 
of Crete, for the purpofe of, eee 
* unthreading”’ the paflage by which he ae 
when an army proceeds ee h clofe faa 
they cannot perform evolutions, and are compelled to 
y files, z. e. with a very narrow front, not exceeding ee or 
onfounded with paffes, though there is a 
gare ve 
at obvious Giltindtion ; for a be of any extent, 
ev ngth of thirty forty miles, whereas a pafs 
more properly {peaking relates fome particular ae 
on the borders of the Black Foreft, he oer prieeeel el 
immenfe wilderneis towards Co fan Nee, cutting roads 
3 thus his army defiled ie - Black 
Foret, to the admiration of all Euro ni From 
aavguaee? chiefly natur 
ct 
~ 
io) 
=| 
as 
= 
Ss 
= 
a 
m 
% 
vt 
kos] 
“= 
= 
— nD 
o 
~~ 
S 
a 
a 
oO 
EFILEMENT, in Fortification, soe the branching 
cae . various a ks in their proper dire&tions, fo chat 
e may ferve to fupport the ee while, at the fame 
ae “all the pea depending exterlorly on any face or 
ront, a the principal, or body of the place, may be under 
the command and fire of the more ceatrical batteries, 
1 ied by th 
on open to ie 
ntric 
7 
