Apart from the observations here described, there are other evidences to show that the determination of the height of this mountain here given is not underestimated. Col. B. C. Smith, one of our party who reached the summit, had this year ascended Mount Shasta, a mountain measured by Prof. Whitney to be 14,440 feet. The Colonel states that he feels confident, from the comparative ease with which he ascended Mount Hood, that it is of much less altitude than Mount Shasta.
On Mount Hood butterflies were found within a thousand feet of the summit. Finally, Prof. Whitney and others, from rough triangulations, have estimated it be about 12,000 feet.
It is to be hoped that other parties with good instruments will take further observations on this mountain. As the height of Fort Vancouver and Fort Dalles are known, and as these are now permanent meteorological stations, further observations on Mount Hood can be referred to one of these stations as a base, and good results obtained.
While another set of such observations may produce slightly different results, I think they will not differ one hundred feet from the estimate here given.
Dr. Gibbons exhibited a specimen of Euphorbia lathyris, and remarked upon its distinguishing characters.
Regular Meeting, October 7th, 1867.
Dr. J. G. Cooper in the chair.
Twelve members present.