[ «7o ] 
Whofoever therefore knows how to extract the 
EjjJfences out of Vitriol and Nitre, whofe Centres 
are Salt, (and the Surface of the Earth is Sait), 
1. Poffeffies the Salt of the Earth. 
2. The Salt of the Sea is made from the Sphere of 
the Sea, and common Salt. 
3. That of the Air is made of Sal Ammoniac and 
Salts of Vegetables. 
4. The Effence of Fire is made foon and eafily 
from a concentrated Spirit of Wine, or of Vegeta- 
bles. Thus the Four genuine Elements of Nature are 
obtained. 
XXXIL An Account of the Fire-ball feen in 
the Air, and of the Explofion heard 3 on Dec. 
11. 1741. by the Right Honourable the 
Lord Beauchamp, near London. 
O N Friday the 1 ith of this Month, being on the 
Mount in Kenfmgton Gardens, at a Quarter 
pad 10 o’Clock, the Sun fhining bright, in a ferene 
Sky, I faw towards the South, a Ball of Fire, of about 
Eight Inches Diameter, and fomewhat oval, which 
grew to the Size of about a Yard and an half Dia- 
meter. It feemed to defeend from above, and at the 
Diftance of about half a Mile from the Earth, took 
its Courfe to the Eaft, and feemed to drop over JVeft- 
minjter. In its Courfe it affirmed a Tail of Fourfcore 
Yards in Length 5 and before it disappeared, it divided 
into Two Heads. It left a Train of Smoke all the 
Way as it went 5 and from the Place where it feemed 
to 
