(See also Appendix, p. 252).--Construction of them; loss
of power of hearing high notes as age advances; trials upon
animals; sensitivity of cats to high notes; of small dogs and
ponies.

ANTHROPOMETRIC REGISTERS

Want of anthropometric laboratories; of family records;
opportunities in schools; Admiralty records of life of each
seaman; family registers (see also 220); autotypes; medical
value of ancestral life-histories (see also 220); of their
importance to human eugenics.

UNCONSCIOUSNESS OF PECULIARITIES

Colour blindness usually unsuspected; unconsciousness of
high intellectual gifts; of peculiarities of mental imagery;
heredity of colour blindness in Quakers; Young and Dalton.

STATISTICAL METHODS

Objects of statistical science; constancy and continuity
of statistical results; groups and sub-groups; augival or
ogival curves; wide application of the ogival; method;
example; first method of comparing two ogival groups;
centesimal grades; example; second method of comparing
ogival groups; statistical records easily made with a
pricker.