( 37^ ) 
exceeding fofr. But as for th^ Cakes I made up of 
it and Wheat Flower, them I found ia nay Cabinet 
in Winter, very hard and firm, and the unmixt Cakes 
ftill foft. Thefe burn with n© unpleafant fmell ; they 
emit a lafting Flame they ftill keep their Amber- 
colour and draw .out in Threads in Burning like 
Wax. 
To this laft Coagulate and Clammy Juice, and which 
will not much harden, we may add the yellow Juice, 
which the Wounds of Angelica fativa Park, yield ,• k 
will not harden by infolation or long keeping (for I have 
had an Eflence bottle of it by me this two Years) 
yet 1 perceive it ftiffens and will draw into 
Threads. 
Examine the Nature of the Juice of Fennel and 
other ferulaceous Plants, Whether their Juices do 
not coagulate after the fame manner. 
^^^^ The next fort of coagulate and clammy Juices, we 
have taken notice of arc Gums; andfomeof them 
^^hfsit ^^^^ ^^^^^ Liquid. Whether thefe are Inflama- 
%mlbie!' hie or no, ! leave for future tryal, having not yet made 
i/4rflrc?«w, the Experiment my felf : others there are which 
^/^^'"^grow hard, and <are certainly not to be kindled into a 
Flame. 
They are eafily to be diflblved in Fountain Water, 
(the Gum of Rhubarb and the Leaves, for Example) 
and do fparkle when put into a Flame,- which two Na- 
tures argue a (erous or waterifti part in them : Again, 
put into a Flame, they melt and become as it were 
Liquid and Dudible; which (hews the cafeouspart in 
them ; and becaufe they will not flame, it is an Argu- 
ment of their leannefs and fcarcity of Oyl. AH 
three put together plairiJy evince, Gums to be coagu- 
late Juices. 
