Show r FRESH AIR A MILK PRODUCER Largest Returns Need Not Be Expected Ex From Animals Where Barns Are Poorly Ventilated Ventilation of barns usually is even more deficient than window space and arid to this lack of proper ventilation veterinarians veterinarians vet vet- attribute in a large measure measure meas meas- ure the prevalence 0 of tuberculosis But put aside from safeguarding the the health of both the owners owner's family and his c cattle good ventilation is econ econ- omy Perfect assimilation of fo food d is no nomore no nomore nomore more possible in the body of an a ani animal i. i mal without a sufficient supply of air than is perfect combustion of fuel in ina ina ina a furnace with the draft closed In order that milk cows or beef animals ani an- mals may respond nd to an increased ration ra ra- ra tion of feed must b supplied for Its combustion as surely as that thata a n. furnace requires more air for Cor a heavy than a light fire In other words words the the amount of milk or beef produced by the animal and the amount of heat produced in the furnace depend as as' as much on the air supply as on the amount of food and fuel If a barn is poorly ventilated it is futile therefore to expect the largest returns in beef or milk for tor the feed consumed |