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Bowman, William in addressee 
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From:
Charles Robert Darwin
To:
William Bowman, 1st baronet
Date:
30 July [1867]
Source of text:
DAR 261.11: 8 (EH 8820 6060)
Summary:

Plans to write a book on expression. Questions WB on orbicular muscle in screaming infant and function of muscle contractions in looking at a distant object.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Bowman, 1st baronet
Date:
7 Aug [1867]
Source of text:
DAR 261.11: 10 (EH 88206062)
Summary:

Thanks for reply to queries. Spectroscope an instance of unimagined glorious prospects of science.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
William Bowman, 1st baronet
Date:
2 Apr [1868]
Source of text:
DAR 249: 72 (photocopy)
Summary:

Gives Charles Bell’s explanation of the contraction of the orbicularis during screaming and seeks confirmation of his view because the action is "the key-stone of a whole class of expressions". Curious to learn WB’s conclusion in regard to the relation between contraction of the orbicularis and secretion of tears. Notes that voluntary contraction of the orbicularis causes no tears.

Contributor:
Darwin Correspondence Project