Foreign Vegitables.' 233 
Caution to be obferved in giving it. When we are 
apprehenfive of the Approach *of a Fever or Inflam- 
mation, it will be proper to order Bleeding previ- 
oufly to it, and to prepare the Patient by Medicines 
that deterge and relax the Stomach and Intedines 5 
otherwife a Fever, Head- Ache, or inflammatoryHeat 
in other Parts, may be the Confequence. Fabricius 
Hildanus , Cent. 5. Obferv. 59. ipeaks of a Sup- 
preflion of Urine which was brought on by the Ufe 
of Turpentine after crude and vifcid Aliment. In 
the Shops, a Spirit, Oil, and Colophony, are pre- 
pared from Venice Turpentine after the following 
Manner. 
• 
Take of the pured Venice Turpentine q. v. Put 
it into a Glafs Retort, leaving at lead two 
Thirds empty. Didil it at firft with a very 
gentle Fire, and a fine ethereal Oil comes over, 
which is mixed with a certain Proportion of 
Phlegm. This is commonly called the Spirit 
of Turpentine. Afterwards by increafing the 
Fire gradually, a yellow Oil rifes up into the 
Receiver, and then a reddifh Oil of a fome- 
what thicker Confidence. If the Fire be now 
taken away, and the Veflels left to cool, a fo- 
lid, friable, pellucid, and reddifh Mafs is 
found at the Bottom of the Retort, which is 
termed Colophony. But if this refinous Mafs 
be dill urged by a dronger Degree of Heat, 
it gives up a thick blackifh Oil, which is call- 
ed by fome the Balfam of Turpentine , and a 
light, porous, black Subdance is left in the 
Retort. 
The Spirit is given inwardly, and in the Quantity 
of a few Drops operates powerfully by Urine. It is 
proper in a Stoppage of making Water from a thick 
fyiucus 
