Birch water woikcdin the Barrel fe : Which (eemsto veti- 
fie Mr, Saracen's relation from his Brother, a Sweclijh Merchant, 
importing^that Birch-water in Sweden workeih alone^(perhaps 
collecStcd in great quantity. ) Only / put a very few Cloves 
into my Sap. Boiled to a third or left, it keeps well, efpecially 
when boiled with the buds or fpiigs of the fame Tree, as I 
have been informed* 
y^fril «65175 185 in the year 167O. Birch-lap mixed with 
Rain water at the Tree^ fermented, with Rofemary^^iigs ftee- 
ped in Spirit of Wine: which warmed the itomack as ftrong 
Wine, and pleaied the palate 5 though the tafteinthe mouth 
was fomewhat waterifh» 
A L etter written by the fame Dr^ Tonge, to the Vuhlijlyer ^ abont 
the Retarding the Accent of Sap^ together with fome other 
ries relating to that SubjeB. 
Q IR, laft: night Sir Moray did me the favour to acquaint 
(J^ me in difcourfe with Ibme particulars about the Gathering 
of Sap in Fruit-trees, and the Retarding the Afcent thereof 5 
which he had received from an eminent Planter in C//^?ce/?er- 
Jhire: Concerning which, / thought it fit to communicate 
fome Reflexions of mine 5 which you may difpofe of 5 as you 
think good. 
It was propounded to me by way of ^ere 5 How to gather 
every drop of Sap that (hould rife in any Fruit-tree ? This, I 
faid,! thought not feafibJe,by what I had experimented hither- 
to* My grounds werethele^ ^irji^ in thofe Trees, whofe Sap 
feems to be of a Gummy nature w hen condenfcd, as Plums, 
Cherries &cA knew no Experiment,by which any drop of Sap 
could be collected. And I fufpedi, fome other Fruit-trees to 
be ofthat naturCi^ whofe Sap I could not draw out atanyfea- 
foo, of hot or cold weather, though they have not been obfer^ 
ved to yield any Gum* Perhaps there may alfo be fomeFruit- 
and other Trees, whofe Saps are vifeous, though not Gummy 3 
and thefe^ I doubt, will not yield any Sap to be gather'd iaa- 
ny common or known way* 
Secondly^ it feem'd to m^ not feafible, to gather all the Sap 
of thofe Treesjwhofe Juyce is fluid and plentiful, and conden- 
feth into a gelly.becaufe it feems at moft feafons of the Year to 
afcend imperceptibly 5 and that not only in the outward, but 
innermoft parts and pores of the Tree 3 not only betwixt Bark 
and 
