DEA 
Dr. Marcet obtained a very fatisfaftory ara . the cons 
tents of this water, but the refults are the follow 
of 
A hundred grains of he water contain 
Grains 
Muriat of lime - - - 3.920 
Muriat of magnelia - - - ‘ 10.246 
Muriat of foda ee - 10.360 
Sulphat of lime - - - - 0.054 
24.580 
All the falts here mentioned are pes as in a flate of 
thorough deficcation, or that in which n ter whatever 
is prefent, except what appears effential be ie conftitution 
of the acid at ared heat. This degree of drynefs, however, 
can only be inferred with Bes to the muriats by eitimation 
experiments; for when are drie 
re 
bao 
oO 
we 
io) 
° 
= 
ct 
a. 
es 
~@ 
o 
.o 
fon} 
co 
i 
i 
wn 
cg 
raat 
o . 
given differ fomewhat from thle er - 
another soe. of analy fis, but this difference is fo {mail as 
only to confirm and not invalidate the general accuracy of 
the experiments. 
On the whole, therefore, it appears that the water of the 
Dead {ea contains about a ann of its weight of falts, when 
in ais . ficcation ; and of thefz faits about ¥5,ths are com 
the remainder almoft entirely a mixture of the 
ime and magnefia; the latter in by. much the 
add, that a {mall wal of the water of the 
river ee (which ig the only ftream of any confiderable 
fize ae pag re io na Dead ae was alfo analyfed by 
Dr. very pure foft taftelefs water, re- 
athe : different in * fenfible properties from that of the 
ea; but on evaporation ’a a plariaed _ Pe 
were obtained, which were foun 
fame as thofe of the lake, but in s Gaal piononinn i 
analy fis. 
Dean-Tops, in Rural Economy, a difeafe incident to young 
trees; and cured by cutting off the dead parts clofe to the 
next good twig or fhoot, and eae them over as in graft- 
ing. 
Deano Water, is the eddy water jut behind the ftern of a 
fhip. [tis fo called, becaufe it see ot pafs away fo {wiftly, 
as the water running by her fide 
If a hip have a great eddy ies her ftern, they fay, 
fhe makes much dead- water. 
Deav- Wood, in Naval Architedure,a name given by thip- 
wrights to certain blocks of timber laid upon the keel, 
bari at the extremities afore and abaft, where thefe 
wood, e angle t r-timbers greatly dimi- 
nifhes as approaching the ftern and {tern-po The dead- 
ood afore and abaft is equal in o two thirds the 
depth of the keel, and as ina as it can be, without excecd- 
inj the breadth of the kee 
Deav-Work, denotes ‘i that part of a fhip, which is above 
water when fhe is laden. 
oe Same: in ae See Tuaps 
our Books, a seat foo we irrecon- 
cileable canis till a perfon is revenged by the death of his 
e 
"Ye 
ne word feud is derived from the German fehd, which, 
s Hottoman obferves vee fies, modo bellum, modo = 
quien ae: See Feu 
DEA 
ee enmity and revenge were allowed by 7 our ancient laws 
in the time o ae axon 
c 
was lawful for a to take up arms, and revenge themfelves 
on the murderer ; which was called onal feud. And this, 
probably, was the original cf an appea 
Deapiy a ed See At 
EADS, in Mining, is uled in cane that part of the 
fhelf or faft eome _ contains no ore; but which en- 
e the ore, like a er on every fide. 
the = fink bia ae tin ore in Cornwall, are 
Sere, about we feet over, and about ane feet highs 
fo that a man may cee fland upright at work, and 
manage a tools. In cafe the vein itfelf is not broad 
enough to allow this, as in many places it is not half a foot 
ue aa they pick down the ftrata that nr it, fo as 
an opening of the fame breadth. ork they 
call ne up the deads. Phil, Tranf. N° << 
s of common loofe 
ufually contain 
abruptly in an earth, they call it a deading-bed ; and earth 
without oe they call dead-earth 
D S, in Agriculture, a term ufed to fignify eau or 
barren, as applied to grain, nuts, &c. 
ears, deaf nuts, &c. fignifying fuch as are deirite e; grein 
kernels, &c. 
DEAFFO se a seal in our Law Books, the being dif- 
charged from being f 
oreft: or freed and exempted from 
fore ft- led See Forest. 
‘© Johannes Dei gratia, &c. archiepifcopis, oe &e. 
{ciatis nos omnino deaffore/tafe foreltam de — om 
nibus, que ad foreftam et foreflarios pertinent. vo- 
lumus et firmiter precipimus, quod predicta et 
homines in illa manentes, et heredes eorum, fint teafir ati 
in perpetuum 
ATNESS, in Medicine, imperfection or abolition of 
the faculty of hear 
The caufes of na lofs or imperfeGtion of hearing are nu- 
merous, as will be readily conceived by any one, who confi. 
ders the complex itru@ure of the ear: and the difficulty of 
diftinguifhing the modifications of deafnefs, as produced by 
thefe different caufes, and pean of curing es difeafe, 
will be not kcfs obvious, if t acles, which nature has 
alfo ne into 
thrown in the w ih of ae an in uae be 
confideration. flential parts of the organization 
of the ear are Pages cae a bony ae beyond the reach 
of examination, and only one of the two paflages, leading to 
it, can be brought under the eye of the obferver, See Ear. 
The varietics of deafnefs have been ufually treated by 
writers under feparate heads, oe to aa Het of the 
orgar, in which the cavfes were lituated ; the meaius 
externus, OF external paflage ; the fila van tube, or paflage 
3 and the internal ear itle 
- Deafnefs from Difeafe of external Pafe age.—The 
a common impedimen ing that occurs in the ex- 
ternal paflage to the ear, mere in an gore pre anes te 
a infpiffation of the cerumen, or wax of the ear, which 
is fecreted by the glands of the paffage. 
cerumen, which may be collected without injuring the powex” 
of hearing, cannot be ftated : it is different in different indi- 
viduals, and in many perfons the quantity is naturally conti- 
erable. Sometimes it has been obferv« 
pallage Sra 3 and fometimes forming 
or thickening the natura ie ut in 
eae eles, we the proper confiftence of ie cerumen 
X2 remains 
= 
