FRICTION. 
greatly diminifhed if wood moves. wpon metal. greafed with 
w. a the velocities, howe ver, are increafed, or the 
a often enough. acl, in both thefe cales, but 
ia in, ed ord the unguent will be more injurious 
than | a ful. beft mode of applying it, i . cover, the 
-furfaces th as thi ik ftratum as pofhi ee - fa 
fridtion will then be a conftan 
» the fquare aa a 
be preferred. ([Fergufon’ s Leciures by Brewfter, vol. i 
cTion-wheek. See the preceding article and aa 
- Friction of . hi of Fluids. See Resistance and 
RETARDATION. 
ieee and Ropss 
HEFL-carriages. 
‘the a&t of rubbing 
N, in oo and Cua, 
with 
the furface Of the whether with the hand only, 
ae: 
en the health and Treg of the body ; an 
t 
circumftan But, on who ic hefe direGtions appear 
to be Bnei, and of litle practical utility. (See Oribatius, 
Medicin. “Colle&. lib. vi. cap. 13. 16—20. — n is 
-ileaaesaiia by this author as chiefly efficacious in removin 
languor and laffitude, and ftrengthening the dige ae powers, 
pe the animal _— in genera ral. ity is recommended to be em- 
ed 
de Coan pede, ; and mas at the condlufion of active 
exereife, in order to remove the fenfations of laflitude, and 
to purge off rementitious matters. oc, Cit. cap.16. 
de apotherapia frig e.) We are ge me that by 
hard rubbing body is rendere oa 
it is son ened > by fr pee and contnved ti n it is 
| he bulk is Beet 
ie canno 
t be qu hare that fri€tionon the furface of the 
body ole an effe 
milar to that o ercife : 
therefore, ented ; the mpletely ef- 
feed, ws the excretions, De ea a ig 5 perpiratin, 
more perfectly throw dcheats 
ith 
The ee: 
fes: the thefe 
animals are generally cea as equigelene te half the 
feeding. 
n this c alah ee the principal gare loytfient of 
. ition is directe the cure rather than to the prevention 
f difeafes ; and is: heme accompanied a : e ufe of 
oie {pecies of medicated oil, ointment, or lot Thefe 
auxiliaries are fometimes poflefled of > edieinal qualities, 
— add to the 2 efficacy of. the friction ; fuch as the volatile 
other ftimulatin hinimens y_ which. the. vafcular aéti 
of dee art, affecte is more fpeedily excited; but frequently 
they are aa no effential feet and are prefcribed partly 
facilitate the procefs. of rubbing, by lubricating the parts,. 
and partly to ache the ‘erie and his ereeny to perfle- 
n the of friction, who are too apt to fuppofe 
that ie fridion felt j is, wfelels, and to ave ibute' the reme- 
dial effects to ed lotion or liniment oe yed. 
RriGtion is an efficacious re medy in feveral, conditions of 
difeate; ie in Secaes ee Are ar. 
mufcular contraétions, fucceedin ; 
ymph ; in {ome 
indolent tumours, &e. | 
e practitioner i in Oxford- 
fhire, Mr. Grofvenor, is faid to eres remoyjng.a num- 
ber of difeafes, of the nature of thofe waft mentioned, i by 
means of long continued fri€tion with the han d. alone : and 
an empiric of the name o. he ceS, Or r Greatri y. 
effected sed cures 3 that Ww deemed ‘marvellous by this me- 
thod of manual at Ww which he called froaki ing. (See 
Phil. Trant "No. 
Friction is Name employ ed with the view of introducing 
a ions ubftances into the fyftem, through the me- 
f the abforbent veflels of t hrough thefe 
on the fin, ae the a ae the 
animal economy. may. be influenced by the peculiar pr ea 
of medicines ; but frition is required to impel them th ough 
the inorganic pores of the fcarf-fin, without which arr 
abforbed. aGtitioners have b been for a 
ime i one of the 
t 
agents. 
the venereal difeafe. 
pregnating the fyftem with mercury are 
The advantages es fae — of i im. 
n fome 
eae and there 
ufficient quantity to eradicate the ‘difeafe, or without | pro- 
a exceffive slates ne by its pie neato . Whea 
the icine is con of the 
eutancou us oe. this area upon the. inca, canal 
oided 
pane active Lo eae | drug has alfo been advantage: 
means of external fric~ 
etter ; 
ported by that of the late Dr. Percival of the Press 
it appears, that the principal res rard confequ 
a refult from the internal ‘adiinitration of this 
narcotic cular aroun and in in fates 
of difeafe, « lec its bya eeable effets on oe head and 
he ftomach, are ayaided by rigtrodueing it ae the ab- 
forbents of i ‘fin, 
jaw, whether from tetanu s or ei Ther ia, when the ous 18 
firmly clofed, that nothing can be made to pafs to the oad be 
the he external Frit ion wit mM Is the only 
4 adminiftering this important remedy. Dr. ‘Pe el found 
opium, thus ufed, gave relief to patients aflicted with — 
ome chronic and painful diforders, without’ occafionin 
— giddinefs, and “alt ae which the internal ufe 
0 
7 landanum had previoufly prodpcee n feveral cafes 
the dein . a ous a ad of mania, oe thus 
employed wa ous. It was iuppofed by fome 
ee ee, who fir —— to the ule of sae ie 
