rumen

1950s

13169_10684_farm_animal_feed2

Part 2 of 2Indiana: visit to Charles Visor & Company‚Äôs…

1950s

13169_10684_farm_animal_feed1

Part 1 of 2Indiana: visit to Charles Visor & Company‚Äôs…

1970s

12806_cow_belly

Cow grazing in field, cow in laboratory with rubber stopper in its side…