140 FAMILY PHYSICIAN. 
Roots should ee Relloctes in the spring, be- 
ops shoot forth, or in the au- 
th 
e 
slices, a strung, after w they may 
pose ge heat, so that they may dry 
gradually 
A roots, and herbs are thor- 
oughly ‘snails; should be kept close from the 
air; also, when pulverized ; _ particulary those 
adult, may be varied to the age of the patient 
according to the plows. rule. Two-thirds of 
the dose for a person fro’ rteen to pines 
one half a seven to ten from 
to. purth, to one of hres years old, sd 
one auth, to one ‘ofa year o 
In the recipes or preceriptions, where it is not 
convenient to obtain all the articles specifi 
seme Nee ey yb substitu ituted ; 
the ey may be added to the composition. If 
eiaher the deficient article nor a substitute can 
he’ readily, obtained, both aay be dispensed with. 
Decoctions, Infusions and Syrups. 
_ The difference between decoctions and infu- 
ons consists only in the mode of extracting the 
“paaluiaa of various substances, e the use of wa- 
_ ter more or less ated. 
| Decoctions are ‘made with | water, over 
Ap heat which peas eva In this way 
_ substances are decomposed while their medical 
