212 
jant effect ; and uniting the ef- 
fect of No. 11 with the peculiar 
effect of the fluid employed. 
32. SaANGuIngEous Evactants. : 
General Depletives, operating 
by a primary and secondary 
effect towards the same issue. 
The abstraction of blood from the body is a 
therapeutic mean of the highest importance. It 
is accomplished by different operations of an arti- 
ficial or natural kind ; and according as these are 
_ So conducted as to affect the general system prima- 
_vily, by immediately evacuating the blood from 
vessels directly in the course of circulation ; or 
secondarily by liberating it from superficial ves- 
‘Sels remotely connected with the circulation: 
Sanguineous evacuants may be thus classed: 
1. Blood-letting by venesection. 
a, by arteriotomy. 
3. by slackening the ligature | 
of the umbilical chordor |. 
by severing it by scis- 2 ; 
sors or scalpel. before | 2 
_ the ligature een ap- | = 
a ef Ss 
4. ——--—— by cupping and the scarifi- | — 
ae ear. ae 
5, by scarification with the | ° 
lancet.  —_ 
_( Natural opera- 
6. by leaching. {tion artificially 
The first and fourth and sixth means are those 
prdinarily resorted to. ‘The second is sometimes 
