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To C. H. Blackley   14 June [1873]

Summary

Thanks for sending Experimental researches. He will read it as soon as he finishes a book in hand. [See 8965.]

Author:  Charles Robert Darwin
Addressee:  Charles Harrison Blackley
Date:  14 June [1873]
Classmark:  Arbor 441–2 (September–October 1982): 148.
Letter no:  DCP-LETT-8943A

To C. H. Blackley   5 July [1873]

Summary

Comments on CHB’s book [Experimental researches on catarrhus aestivus – hay-fever or hay-asthma (1873)].

Explains that some pollens are wind-blown while others depend on insects for dispersal. Effect of pollen on skin and mucous membrane astonishing. Sends a book [M. Wyman, Autumnal catarrh (1872)].

Author:  Charles Robert Darwin
Addressee:  Charles Harrison Blackley
Date:  5 July [1873]
Classmark:  John Hay Library, Brown University (Albert E. Lownes Manuscript Collection, Ms.84.2)
Letter no:  DCP-LETT-8965

From C. H. Blackley   7 July 1873

Summary

Thanks for copy of Wyman’s book.

His own recent researches [on pollen] at high altitudes were inspired by CD’s account in Journal of researches of distances dust may travel.

Author:  Charles Harrison Blackley
Addressee:  Charles Robert Darwin
Date:  7 July 1873
Classmark:  DAR 160: 192
Letter no:  DCP-LETT-8967

From C. H. Blackley   11 July 1873

Summary

Thanks for suggestion to try effect of dry heat on pollen and for other new information on pollen. Will begin new experiments soon, hoping to cure hay-fever.

Author:  Charles Harrison Blackley
Addressee:  Charles Robert Darwin
Date:  11 July 1873
Classmark:  DAR 160: 193
Letter no:  DCP-LETT-8974
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1873
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