[ 5°4 ] 
the evidence I have brought inefficient to prove it, 
he is defired to invalidate what I have here faid, by 
a dedudion of frefh evidence, and to account' for 
thefe feveral expreffions in old authors, which feem 
to prove, that fuch a change has really happened. 
XLVIII. The Method of making Sal Ammo- 
tiiac in Egypt ; as communicated by D?\ 
Linnaeus, from his Pupil D?\ Haflelquift, 
who had been lately in thofe Parts • By 
John Ellis, Ef r , R R. S. 
Reader.. 5..QAL Ammoniac is made from the foot 
. ^*3 arifing from the burnt clung of four- 
footed animals, that feed only on vegetables. 
This dung is colleded in the four firft months of 
the year, when all their cattle, fuch as oxen, cows, 
buffaloes, camels, (beep, goats, horfes, and affes, 
feed on frefh fprmg grafs, which, in Egypt, is a kind 
° tt eroil, or clover: for when they are obliged to 
feed their cattle on hay, and their camels on bruifed 
date kernels, their excrements are not fit for this 
purpofe ; but when they feed on grafs, the poor 
people of Egypt are very careful to colled the dunv 
quite frefh, and, for that purpofe, follow the cattle 
all day long,, in order to colled it as it falls from 
them; and, if it is too moiif, they mix it with chaff 
nubble, fhort ffraw, or duff, and make it up in the 
form of cakes, about the fame fize and fhape as it 
lies on the ground. 1 
Then 
