[Correspondence re article of Karoly (Charles) Ereky on 'Preserving Green Crops'. 16 items, 1924-1926. Letters chiefly concern Ereky's process by which 'fresh green plants are ... turned into preserve within twenty-four hours' by which proteins are retained and milk yields of cows kept high. They include three letters re provenance] Correspondence re article of Karoly (Charles) Ereky on 'Preserving Green Crops'