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ruinous, d;ftinguifh the Margin of the Paper, that had 
not been warmed by the Brafs. 
The Author proceeds to take notice of thofe Thof- 
phori which become fo by the Affiftance of Fire. 
But the Fire here fpoken of is not great enough to 
diffolve their conftituent Parts, but only fuch as may 
affeft the external Parts of their Texture, and that but 
gently 5 fo that the Procefs here mentioned is only 
drying or roafting. For it is not the watry or the 
faline Part in Bodies which is torrefied ; but the olea- 
ginous, wherewith many Vegetables, and moil Ani- 
mals, abound. 
The white Flefh of Animals, fuch as that of Chick- 
ens, becomes a Phofphorus by roafting, as well as the 
Tendons, and whatever Parts of Animals become 
glutinous by boiling, fuch as Carpenter’s Glue, Ifing - 
glafs; to thefe may be added Cheefe. Bones, tho’ 
they imbibe Light without any Preparation, have that 
Property in a much greater Degree when burnt, and 
their luminous Appearance is much more lively. But 
Roafting has not this Effed upon Feathers, Hoofs, 
Horns, or Whites of Eggs. The fame Operation, 
which produces feveral Phofphori from the animal 
Kingdom, gives alfo feveral from the vegetable. 
Thus, by gently toafting, Gums, as Myrrh, Gum 
Tragacanth, and others, appear luminous, tho' 
different in Degrees j and this Light is clear, in pro- 
portion to the gentle Evaporation of their aqueous 
Parts. By this Treatment, Nuts of every Kind, Pulfe, 
Corn, Coffee-Berries, Meal, Bread, and Wafers, alfo 
become ‘Phofphori ■ Turpentine, Amber, and fbme 
Rcfins, require more Fire before they imbibe Light ; 
lo that you mult divert them of their Acid, and their 
light 
