Note 50 — Chapter VI
Reading edition
By reference to the Treatise on Heat, in the Encyclopædia Metropolitana, numerous suggestive experiments will be found, all bearing on this subject. Peschel’s Elements of Physics may also be consulted with advantage. The fact is, however, simply proved, as stated in the text, by placing the bulbs of delicate thermometers, so as to be completely involved in the petals of flowers exposed to sunshine, shading the upper portion of the stem of the instrument.