( »*4 ) 
Nitrous Salt, (as Glauber (ays) and its Quantity alfo in- 
crealed very confiderably. Not that the Lightning 
had fo calcined the Wood, as to reduce it to a perfect 
Salt, but yet by penetrating of it, it had calcined it in 
fuch meafure, as to give it a like propriety or difpo- 
fition, of attracting the Nitrous Salt of the Air, as afore- 
faid Alkalfsot Wood that have been fully calcined. 
Now if it fhould be objected, that the Nitre in this 
Wood being Volatile , would flee away in the burning 
of the Wood ; we anfwcr, That although Nitre can't 
be fixed, and reduced to an Alkali-Salt , by calcining it 
per fe ; yet it may fo by the addition of the powder of 
Charcoal (as Chymifts teach us.J And here we fup- 
pofe the Wood fo altered by Lightning, in which this 
Nitrous Salt was lodged, as ferved inftead of Coal in 
the Burning of it. 
t 
FINIS. 
LONDON: 
Printed for W. and J. /nnys, Printers to the Royal 
Society ; at the Sign of the Prince's- Arms, the Weft- 
End of St* Paul's-Church-Tard. 
