ey ROL gs K shat 
7 
REMEDIES—PREVENTIVE TREATMENT. 285 
tle to secure a footing. Brace the vat crosswise by using 2 by 6 by 9 stuff, well 
nailed into top of uprights. Thisis very importantas it prevents bulging and collapse. 
The dripping floor is built at the exit from the vat and slopes 1 foot, draining into 
vat. It should be cleated to prevent slipping of cattle. It is important that the 
exit and dripping platform be 1 foot above water line to check waves and prevent 
waste. 
We have not found a drainage pipe necessary. Fill in around the vat up to ground 
‘line and tamp well. Inclose dripping floor with a strong fence and provide a gate. 
Chute and trapdoor.—Make a long narrow chute, 3 feet wide, leading to vat, and box 
up sides tight, so cattle can not see out. Sink two posts 6 by 6 by 8 at end of chute 
as close toend of vat as possible and bore 1} inch auger holes through the posts at 
ground line, and put a 1}-inch iron pipe through on which to balance the trapdoor. 
Allow boxing of chute to project 3 feet into vat. Make trapdoor of heavy material, 
7 feet long, 2? feet wide, and attach same to axle so as to allow 4 feet,to project into 
chute and 3 feet into vat. Thus arranged it will fall back into place after being 
tilted. It is desirable, though not necessary, to face trapdoor with boiler iron, as 
it will cause cattle to slip readily and because wood soon wears out. 
Construct pens something like diagram. (See fig.170.) You may find overflow 
pipes desirable in case of heavyrains. These consist of 1-inch or 13-inch iron pipe, 2 
feet long, one elbow and another pipe, say, 8 or 10 inches. Put long end in vat and 
short end through hole in side of vat about 54 feet from bottom, or at water line. 
In case of flooding this will allow the water to escape and will hold the oil. The 
arrangement described above has been in operation at this station two years and has 
proved so satisfactory that I have no change to suggest. 
Our vat cost about $100. I think it could be duplicated almost anywhere for $150. 
a 
Mh 
