Edward Corning, The Corning egg farm book by Corning himself (1912)
“ If fed in sufficient quantities to actually stimulate the egg organs of the hen it must in a short time kill her, but if it should not have this effect, it certainly does put her in such a condition that she is worthless as a layer. It must be constantly borne in mind that the production of eggs is not a question of stimulation, but is the putting of the hen into a perfect condition of health, keeping her in that condition, and supplying her with foods which are egg making substances, and which nourish her completely, and allow a surplus to be turned into eggs. ”
