Cecil Weatherly, 1911 Encyclopædia Britannica (1911)
“ The growing tendency in England to lay stress on the mental training of very young children, and to use the “infant school” as preparatory to the elementary school, has led to a considerable reaction; medical officers of health have pointed out the dangers of infection to which children up to the age of five are specially liable when congregated together—also the physical effects of badly ventilated class-rooms, and there is a consensus of opinion that formal mental teaching is directly injurious before the age of six or even seven years. ”
