ixxjv. INTRODUCTION. 



wort, pour upon them a ouart of olive oil, md 

 ]et them stand together till the oil 13 of a reddish 

 co! ur. Oil of elder is made of a pound of elder 

 flowers, which are to be put into a quart of olive 

 oil, and boiled til! they are crisp, and the oil is to 

 be then stn ied off. 



3. What is called the green oil, is thus made, 

 bruise in a marble mortar three ounces of green 

 chamomile, with the same quantity of bay leaves, 

 sea-wormwood, rue, and sweet marjoram ; then 

 boil them in a quart of oil of olives, till they are 

 a little crisp. The oil is then to be poured off, 

 and when cold put up for use. 



These oils are used to rub the limbs when there 

 is pain and swellings ; their virtues will be found 

 at large, under the several herbs which are the 

 principal ingredients : and after one or other of 

 these methods, may be made the oil by infusion, or 

 by boiling of any plant, or of any number of plants 

 of like virtue. 



Lastly, though herbs are now left out of the 

 composition of plaisters, even the melelot being now 

 made without the herb from which it was first 

 named : it may be proper to add the way of pre- 

 paring a few that are most useful, and ought to be 

 kept in families. 



i. The common plaister is thus made; boil 

 together a gallon of oil, live pounds of powdered 

 litharge, and a quart and four ounces of water. 

 M hen the water is boiled away, the rest will be 

 jitiitcd into a plaister, but it must be stirred all the 

 time : this . d to he called diachylon. To make 

 diachylon with the gums, add to a pound of the 

 last described, two ounces of galbanum, and an 

 ounce of common turpentine, and the same quan- 

 tity of frankincense. Melt them all together, the 

 gums ft: it, a:;d :!., >add the plaister. 



