40 Farmers’ Bulletin 1150. 
discarding the pieces 
that have turned 
white. Crushing the 
crystals will hasten so- 
lution. In dosing, one 
\ may use a rubber tube 
with a funnel on one 
end and a piece of 
metal tube at the other. 
The metal tube is 
placed in the sheep’s 
mouth and the solu- 
tion slowly poured 
through the funnel. If 
large numbers of sheep 
are to be treated, the 
‘* apparatus figured (fig. 
25), or something simi- 
lar to it, may be used. 
The copper-sulphate 
solution is fed from a 
high reservoir, by si- 
phoning or by a tube 
or spigot near the bot- 
tom, through a rubber 
tube into an open grad- 
uated glass tube, which 
may be made from a 
large olive jar, and al- 
lowed to escape in 
measured doses 
through the other rub- 
ber tube to the metal 
tube in the sheep’s 
mouth. Instead of an 
open graduated glass 
\ tube, a large bottle or 
; jar may be used if a 
third tube is put in the 
jar, through the cork, 
Fig. 25.—Dosing device for administering copper- ofe end being oe Me 
” sulphate solution, ; the outside and the 
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