22. Account of the Gold and Silver Mines of Hungary. 
duce to profit. The students generally form themselves into as- 
sociatious of two or three, for the purpose of carrying on their 
chemical and metallurgic processes in the laboratory with greater 
care and advantage; and I was much pleased w vhen Professor 
D’Horing one day pointed out to me various repositories ap- 
propriated to each, for placing away the apparatus, und every 
article necessary for conducting these experiments and assays, 
the whole of which are provided for them ‘by the public fund. 
The number of students at this college varies a good deal, and 
at present, owing to the general and long continued disorder in 
public affairs, is at alow ebb—it seldom, however, falls short of 
from 200 to 300. Many go regularly through the whole course, 
but others attend only the lectures which are connected with 
their particular pursuits. 
Kremnitz.—Kremnitz is situated, like Schemnitz, in the midst 
of mountains. It consists within the walls of thirty-five houses, 
one of which is the mint. They are arranged round an open 
space where the market is held. There are some streets and 
many detached houses without the walls, and at the distance of 
about a quarter of a mile in the valley are situated the silver. 
furnaces. 
It will be remembered that the silver at Schemnitz was left, 
some in the state of rich ore, and some, after it had undergone 
the process by which it was concentrated in the metal which 
had issued from the lead furnaces. The greater part is sent 
here, but some to Neusohl and Schernovitz, to be resmelted 
with the ores of this neighbourhood, which contain a much 
larger proportion of gold, and the metals are here finally sepa- 
rated and refined. 
Each parcel of ore, and every ingot of metal, before it is deli 
vered to the furnaces, is again assayed by the proper officer in 
the following manner: 
From each parcel of ore a certain number of ounces are taken 
in such a way as will give an average sample of the whole. This 
is heated to drive off ‘all the moisture, and then reduced in an 
iron mortar to a fine powder; a known quantity of this is put 
into a small crucible, and to it is added about twice its weight 
of pure lead in grains of the size of small shot, and known to 
contain no silvers If however it be very refractory, a mixture 
of one part borax and two of glass of le sad, or the vitreous slag 
of former assays, is added to f facilit ite the fusion. The crucibles 
thus charged are so art ranged in the furnace, that no mistake 
can arise respec ting the parce el to which each assay belongs. 
A strong heat is then raised in the furnace, which is continued 
until the fusion is complete. They are then taken out, and when 
cold, 
