Asks M. J. Berkeley to identify the microscopical spherical bodies CD found in drops of yellowish rain-water that fell on his garden in a brief shower.
A very slight shower, lasting hardly more than a minute, fell here this morning
(July 2) about 10 o'clock. My wife gathering some flowers immediately
afterwards noticed that the drops of water appeared yellowish, and that the white Roses
were all spotted and stained. I did not hear of this circumstance till the evening; I
then looked at several Roses and Syringas and found them much stained in spots. Between
the petals of the double white Roses there were still drops of the dirty water: and this
when put under the microscope showed numerous brown spherical bodies,
- f1 4230.f1CD's letter was reproduced in the Gardeners' Chronicle with explanatory notes by Miles Joseph Berkeley, who had been a regular contributor to the journal since its commencement in 1844 (DNB). Berkeley thought that the `larger bodies' described by CD were the `pollen grains of some Thistle or Centaurea'. He also noted that the `ferruginous spots on the white petals of Philadelphus' forwarded by CD consisted of `siliceous particles', and `multitudes of irregular bodies so minute as to present the Brownian molecular motion'.