282 APPENDIX. 
an efFedual Way to prevent the Burning of 
Receivers and Retorts, to lute at thejunfttafe^ 
a glafs Tube eight or ten Feet long, and half 
an Inch in Diameter, thro* which the Air 
which arifes in Diftillation pafl'es 5 the Length 
of the Tube at the fame time preventing, in 
a good Meafure, the flying off of the fine vo- 
latile Parts. By means of this Precaution a 
Retort may alfo with Safety be filled fuller of 
fuch windy Subftances as will not boil over 
without any Danger of burfling the Glafl'es, 
Observation XI. 
I. VI 7H E N in Experiment LXXIV. VoL I. 
VV p. 184. half a cubic Inch of Sal 
Tartar was diflilled from an animal CalXy there 
arofe from it two hundred and twenty four 
times its Bulk of Air, and the remaining Sco- 
ria did not run per deliquitm, an evident Proof 
that all the Sal Tartar was diflilled over : 
Which fhews that Sal Tartar confifls of vo- 
# ladle Salt, firmly combined with Air Particles 
by the Adion of Fire. For in the DilToluti- 
on of the Parts of a vegetable Subflance by 
Fire, a confiderable Quantity of volatile Sale 
flies off into the open Air j while at the fame 
time^ 
