( 3 54 ) 
placed in proper Parts of the Pan for that Purpofe, and 
Part of it fixes, on the Bottom of the Iron Pan fo hard, 
as to be afterwards dug off •, and this the Workmen- call 
Scratchy and is what Dr. Collins,^ in a former Tranfa- 
dioii cdncerning the Sea Water boyl’d at Shei/Js, calls 
a Stone Powder. When the Operation for the Sea Salt 
is finilh’d, it is taken out hot, and. put into, wooden 
Troughs with Holes at the Bottom, through which 
runs the fuperfluous Liquor : Under thefe Troughs are 
fet other Vefiels (with Sticks fixed in them in a perpen- 
dicular Poflure) to receive what runs through. In thefe 
Veffels the Liquor is fuffer’d to continue fome time, 
and according to the Quantity of Sea Salt ftill left in 
it, will cryftalize to the Sticks, fomething like Sugar- 
candy, but in much larger Shoots j and this they call 
Cat-Salt^ or Salt-Cats, 'and it holds fome (hare of the 
bitter Salt. When this Salt is broke fmall, or rather 
powder’d, it is fo white, that fome Gentlemen choofe 
it for their Tables-, but the greateft Confumption of 
it is among the Cake Soap-Boylers. The Liquor that 
will not Ihoot to thefe Sticks, is what at thefe Works, 
they call the Bittern, fit for making the Sal Catharticum^ 
The Remainder of this curious Paper flail be commu- 
nicated in our next , . 
LONDON: Printed for TT, and J, ZnwjJ, Printers 
to the Royal Society * at the Princess- Arms, the Weft 
End of St. Paul's Church-Yard. 
