IN NATURE of May 13 (p. 308) Dr. Hill states that “no volatile body, the density of which is not greater than that of air, is a stimulant of our olfactory membrane.” I venture to suggest some ...
Water vapor density variations depending on season (horizontal axis) and latitude (vertical axis) throughout the year: (a) represents experimental data, (b) is a numerical simulation, and (c) is the ...
IN a letter to NATURE of May 13 I made a statement to which Dr. Perman very naturally takes exception (May 27, p. 369). He cites ammonia, hydrocyanic acid, and hydrofluoric acid as instances of ...
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