SWINE PRODUCTION 307 



into the tissues of the body, and at the same time to inject 

 in a different place a little dose of virus. When this is done by 

 someone who understands all details, it should make the pigs 

 immune to cholera. Doses of serum and virus vary with the 

 weight of pigs. Ask county agents or other authorities to 

 show methods and give advice regarding treatment to prevent 

 hog cholera. (Farmers' Bulletin 834). 3^^ 



TiT*-^- ^"*-*o --* 



Pig Project Problems. A pig club boy started with tweCp^rbrcd 

 gilts which he bought from a neighbor at eight dollars each, at weaning 

 time, May 15. Each weighed 30 pounds and was 60 days old. He made 

 a movable pen of eight ft. strips of 1 by 3 inch lumber and four corner 

 posts each 3% feet high of 2 by 4 inch lumber, costing two oents per 

 board foot. Some barrel staves for palings were given him. Find the 

 cost of the pen allowing 10 cents for nails and 50 cents for the boy's 

 labor. Answer $1.12. 



2. Using a scale of y inch to a foot, draw a plan of one side of the 

 pen showing two corner posts, top and bottom strips of 1 by 3, and the 

 staves nailed to these strips. 



3. Calculate the cost of feeding, watering, moving the pen to fresh 

 grass, and other care of the two pigs for the 90 days of this boy's owner- 

 ship, allowing 25 minutes per day at 10 cents per hour; 400 pounds of 

 feed averaging $1.40 per hundred; 25 cents for mineral matter; 120 

 gallons of skim milk valued at 8 cents per gallon. Answer $19.20. 



4. The combined weight of the pigs was then 300 pounds. What was 

 the gain for each per day for the 90 days? Answer \y z Ibs. 



5. What was the average cost per pound of gain for the first 90 

 days? (see result in problem 3). What was the cost per day? 



Answer 8 cents. 21^ cents. 



6. At the same rate of cost per pound of gain, what will they have 

 cost the boy when they are 12 months of age if they then weigh 600 

 pounds? Include cost of pigs and pen. Two A-shaped houses were 

 built in the fall at a cost of $25 each, one-tenth of which should be 

 charged to each gilt. Answer $65.32. 



7. One of the gilts was taken to the County Fair in the fall at a cost 

 of $3, but won a prize of $10. Deduct this net income from the result 

 in problem 6. Answer $58.32. 



8. Litters of 9 and 11 pigs farrowed March 15 were all raised. 

 Allowing $60 for feed, labor, etc., since the time mentioned in problems 

 6 and 7, what was the average cost per pig at weaning time, May 14? 

 (Charging all to the 20 pigs). Answer $5.92. 



9. Twelve male pigs were then sold for an average of $7.50, but the 

 registration of the 20 pigs and membership in the swine association cost 

 $20. $1.00 was spent for advertising, and $6.00 for anti-cholera inocu- 

 lation. Compare with the cost found in problem 8, and find the net cost 

 of the 8 gilts and 2 sows. Answer $55.32. 



10. He then sold 4 of the registered and inoculated gilts for $12 

 each. What must he get for each of the mother sows to clear $80, on the 

 year's project, besides the 4 gilts he keeps? Answer $43.66. 



