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Darwin Correspondence Project

To [?]   [1872?]

(Does the same infant or young child cry, all the time, & on successive occasions, on approximately the same note?)

(Do different infants or young children cry on the same note relatively to their usual voices?—)

(The same questions about laughter.)—

(When young children are impatient & call louder & louder for anything, does the pitch change?)

(If the pitch changes during crying or laughter, or impatience or anythingQQQQ, I shd be very glad of any remarks on the nature of the change.)— (Is the pitch higher in crying or screaming than in laughing?)

Remember that I am as ignorant as a pig all about pitches & tones & such things.1

C. Darwin


CD discussed the pitch of children’s speech in Expression, p. 86, and the possible relationship between the shape of children’s mouths when crying and the sound resulting in Expression, pp. 91–2.


Queries about the pitch of children’s crying.

Letter details

Letter no.
Charles Robert Darwin
Source of text
British Library (Surrogate RP 8051)
Physical description
1p photocopy

Please cite as

Darwin Correspondence Project, “Letter no. 8135F,” accessed on 21 October 2019,

Also published in The Correspondence of Charles Darwin, vol. 20