1866. | Mining and Metallurgy. 109 
means of light brushes, which are made to sweep the surface, all the 
heavy matter, of course containing the tin, is deposited nearest the 
centre. Beyond twelve or eighteen inches from which but little tin 
is found.- 
Another form of machine has also been recently introduced, 
which is known as “ Borlase’s Buddle,” bemg named after the in- 
ventor. This “buddle” differs from the ordinary form in de- 
livermg the fluid containing the earthy matter and the tin at the 
circumference, and distributing it towards the centre. The con- 
struction of this apparatus will be seen, at once, from the accompany- 
ing drawings :— 
SECTION. 
is — Wit. = ere reeecos os 
CLOPLA GA, SIGS PS IOV: 
7 Yi reas D Bt EL OL BAS. BD Se SS 
bt ed ni ibid, GEG MDa LA SAAAIABAE VASE PITA 
By this arrangement the tin stuff in its state of fine powder in 
suspension in water is, at once, spread out in a thin sheet, and the 
