165 
according to the greatest depth reached in each of the countries 
referred to : — 
No. 
Country. 
Name of Mine. 
District. 
^Mineral 
Worked. 
Depth 
in Yards. 
1 
Austria 
Adalbert ... 
Prizibram . . . 
Silver & Lead 
1,093 
2 
Belgium ... 
Viviers ... 
fiiUy 
Coal 
940 
;{ 
Saxony 
Zwickaw ... 
Coal 
879 
4 
Prussia 
Samon 
St. Andre ... 
Silver 
8J4 
5 
Gt. Britain 
Rosebridge . . 
^Vican 
Coal 
814 
0 
Norway 
Konsberg ... 
SHver 
623 
7 
Hungary ... 
AmaHa 
Schmeritz ... 
Gcdd & Silver 
590 
8 
Prussia 
Camphausen 
Saarbruck... 
Coal 
550 
9 
Spain 
La'Luerti ... 
Canada 
Silver 
516 
10 
Italy 
Monte Masio 
Gavarrono... 
Lignite 
481 
11 
Sweden 
Bersbo 
Copper 
459 
Pays-bas ... 
Whilhelm... 
Kerkrade ... 
Coal 
364 
13 
Baden 
Hagenback 
Coal 
360 
14 
Portugal ... 
Tavlor 
Palbal ... 
Copper 
359 
15 
Bavaria ... 
Max 
Stockholm 
Coal 
286 
16 
Piussia 
Turjiask ... 
Copper 
202 
From this statement you will see that the shaft of the 
argentiferous lead mines of Prizibram, in Austria, has 
achieved the greatest victory up to the present time, the 
silver and lead being now actually worked and drawn from 
a depth of 1,093-1 yards. These mines were first explored 
about the sixteenth century, but only commenced actual 
working to any extent about the year 1779, and up to 1800 
the shaft was only 290 yards deep. In 1865 they had 
reached a depth of 781*2 j^ards. This shaft seems, from the 
earliest period, to have, year by year of its existence, had 
the honour of testifying to the practicability of deep mining ; 
for, during the first 96 years of its working, the annual 
increase of its depth was 34? feet, and during the last ten 
years it has annually increased on the average 88 feet. 
From the table I have given, you will see that the 
deepest coal mines in the world are the Yiviers, Eemus 
shafts, near Gilly, in Belgium, which are sunk to a depth 
of 940 yards in one perpendicular shaft. From a drift at 
this depth another shaft has been sunk to a further depth of 
222 yards, making a total of 1,162 yards. The above 
