Pollen-grains in the Air

  title={Pollen-grains in the Air},
  author={Hubert Airy},
I AM very sorry to find that, owing to my absence from home at the time, a question addressed to me by Mr. A. W. Bennett, in NATURE, vol. ix. p. 485, has escaped my notice hitherto and remained unanswered. Mr. Bennett, alluding to my letter on “Microscopic Examination of Air” (NATURE, vol. ix. p. 439), asks on what ground I refer the “triangular pollen” captured on my slide to the birch and hazel. The identification resulted from comparison under the microscope. The pollen-grains which I… Expand
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