C 507 j 
long, narrow parallelograms, or longifh fquares, if 
I may be allowed to ufe the expreflion ; c> c , fome 
of the yellow faline matter. 
This fait is pleafant to the tafle, and evidently 
generates cold in the mouth in the time of its folu- 
tion; but I had not quantity enough to try with a 
thermometer what degree of cold it generated in the 
time of its fclution in water. 
SECTION IV . 
Of neutral Salts formed with Flowers cf Benzoin , 
and Salt of Amber. 
Experiments I. and II, 
With the flowers of benzoin. 
Mod; modern chemifls have looked upon the gum 
benzoin as a refinous fubflance, which bears the 
fame analogy to the vegetable refins, as the fucci- 
num or amber does to the foflil bitumens ; and 
they have edeemed the flowers of benzoin to be an 
acid fait, mixed with an oily and a fmall propor- 
tion of an earthy matter; but have brought no 
proof of its being fo. 
1. In order to afcertain this fadt, I put tw r o 
drams and a half of the flowers of benzoin into 
fome water, and then dropped into it by degrees a 
folution of the foflil alkali ; every drop railed an 
ebullition or effervefcence, in the fame manner as 
when any common alkaline fait is throWn into an 
Ttt 2 acid 
