Regular Meeting, May 7th, 1866.
President in the chair.
Eight members present.
Mr. Harford presented some ivory nuts from Panama.
Dr. Gibbons made some remarks explanatory of a series of tables which he exhibited, showing the variations of rain fall at San Francisco, and their relation to the phases of the moon. He showed that the greatest amount of rain fell immediately before the time of full moon, and that, following the day of the full, the diminution in quantity was very rapid. The series of observations from which the tables were prepared extended over a period of fifteen years.
Dr. Gibbons remarked that he proposed continuing the investigation of the subject of the connection of the moon’s phases with the fall of rain, and that he would prepare a paper on the subject.
Considerable discussion followed on the subject of the weather of this coast, in which nearly all the members present took part.