( 35 ) 
fchenij and let ftand 24 Hours ; then poured 
off*, and frefii put on, and fhifted again, till 
green Copperas would no longer change the 
Colour of the Waters, then the Leaves ta- 
ken out and dried flowly, had loll only 9 
Grains , i. e. near i-i2th Part, and 103 
Grains were left. Another Part is drawn 
out by boiling in Water over an open Fire; 
thus the laft 103 Grains boiled in a Pint 
and an half of Water to half a Pint, and 
the Operation was repeated fix or feven 
times ; then the Leaf was taken out and 
dried, and it had loft fome Grains. There 
is ftili anothef Sort that cannot be extracted 
by watery Vehicles, but muft have re&ified 
Spirits. Thus 22 Grains of dried Pekoe 
Tea, that had been infufed and boiled in 
fundry Waters, infufed in rectified Spirits, 
and then dried, had loft 2 Grains ; 1 1 2 
Grains of Bohea Tea , that had been ufed 
before, loft 7 Grains in Spirits. There is 
Ftili another Part, which is only leparable by 
an open Fire ; for 2 Drams of the above 
Teas (that had been infufed in cold Water, 
boiling Water, boiled and infufed in Spirits) 
being put in a Crucible, fet in a clear Fire, 
and llightly covered with an Iron Plate; 
D z the 
