PROBLEMS 
341 
rickets, eczema, paralysis, lung worms, and remedies for these. Make 
special study of curing meats on the farm; of coiperative marketing 
and shipping. 
A 
Surveys, Trips, Problems, Projects, and Exercises 
A local survey has been suggested. Include in this questions on 
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Fra. 230.—Light-weight pork production is most popular for some markets 
(California Station.) 
breeds, number of brood sows, number and kinds of houses, areas of pas 
tures, crops grown, crops hogged-off, watering systems, number of litters 
per year, times of farrowing, sizes of litters, number of pigs raised to 
weaning time, rations for brood sows, rations for weanlings, special winter 
Fic. 20 Fl pes carried to a weight of 200 pounds using a self-feeder containing shelled 
corn, wheat middlings, and digester tankage in separate compartments. (New Jersey Station.) 
succulence, losses from disease, inoculation, treatments for worms, treat- 
ments for lice, other treatments, number of pigs sold for breeding purposes, 
number sold for pork, prices, number butchered at home, type of curing, 
(Fig. 232.) 
2. Problems.—(1) Calculate the average income from pure-bred herds 
and compare them with the incomes from grade swine. (2) Calculate the