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Average pollen size 25 microns, i.e., about 125 times larger than respiratory aerosols carrying pathogens.
Average pollen size 25 microns, i.e., about 125 times larger than respiratory aerosols carrying pathogens.
He investigated over 80 types of pollens, concluding grasses caused the greatest reaction. He was in correspondence with Darwin:
Darwin asked if there is a difference between plants that pollinate by wind and those that pollinate by insects.
Darwin asked if there is a difference between plants that pollinate by wind and those that pollinate by insects.
Can pollen be carried large distances in the upper regions of the atmosphere? Blackley wrote on 7 July 1873: "his experiments ... inspired by Darwin’s ... collecting atmospheric dust at Porto Praya"
darwinproject.ac.uk/humannature/20…
darwinproject.ac.uk/humannature/20…
