Barometrical

On the 30th, accompanied by Jerome Fay, I made another ascent to make some barometrical observations, the day intervening between the two ascents being devoted to establishing a camp on the extreme edge of the timberline.

Of course, account must be taken of other than political considerations in estimating the significance of this record, nor do I wish unduly to dwell upon what may be called its barometrical value in the study of contemporaneous French history.

We do not mean to ask if you have from youth been in the daily practice of rising from your study-chair at regular intervals, and ascertaining the precise point of Mercury's elevation on the barometrical scale.

I examined, with great satisfaction, your barometrical estimate of the heights of our mountains; and with the more, as they corroborated conjectures on this subject which I had made before.