Perhaps these lakes may be too large to manifest the uninodal rhythmical oscillations which have been so successfully studied by Forel in the smaller lakes of Switzerland.[3] Be this as it may, there can be no doubt that Lake Tahoe is a body of water in all respects adapted for the manifestation of this species of oscillation; and that, like the Swiss lakes, it is subject to _Seiches_.

Indeed, the far greater simplicity in the configuration of the basin of Lake Tahoe than that of the Lake of Geneva must render the phenomena much less complicated in the former than in the latter.
Professor LeConte then gives his computations as to the probable duration of the oscillations on Lake Tahoe, should they occur there.
[Footnote 3: It is proper to add that _Fluctuations of level in the North American lakes_ have been noticed by various observers, from the time of the Jesuit Fathers of the period of Marquette, in 1673, down to the present epoch.

Among those who have discussed this problem may be mentioned in chronological order: Fra Marquette in 1673, Baron La Hontan 1689, Charlevoix 1721, Carver 1766, Weld 1796, Major S.A.
Storrow 1817, Capt.

Henry Whiting 1819, H.R.Schoolcraft 1820, Gen.
Dearborn 1826-29.].