[ 5 ° 1 
-CHAP. VIII. 
Of Gem- Salt, Sea-Salt, and Spring-Salt, 
S^EM-Salt diffolved in warm Water,- and 
^ a Drop applied to the Microfcope on a 
Slip of Glafs, either holding it over the Fire 
for a little while to haften the Experiment, 
or leaving the Water to evaporate at leifure, 
affords the feveral Figures that appear in the 
iirfl Plate, N° L 
Sea-Salt treated in the like Manner pro¬ 
duces Cryflals as at N° II. 
The Figures of Spring-Salt, or Bafket- 
Salt * , obtained by the fame Method, are 
fhewn at N° III* 
The Figures of thefe three Salts differ 
very little: each of them producing Bodies 
of the like Forms viz. folid Cubes, 
fquare Plates, and hollow Pyramids, hav¬ 
ing Bafes that are either exad Squares, or 
Redangles, and whofe Hoping Sides dimi- 
nifh gradually upwards by a kind of Steps, 
feme terminating in a Point, and others 
appearing truncated, or ending with plane 
Surfaces. Each Kind of thefe Salts does 
not however produce the fame Figures in 
equal Plenty, for Gem-Salt affords mod: 
Variety ; Sea-Salt abounds chiefly with 
* This does not mean that all Salt made from Springs is 
B^/ket-Salt, but only that our Bajket-Sah is one Kind 'of 
Salt made Jjom Springs* 
thofe. 
