In the “Challenger” Report on atmospherical circulation, the diurnal barometric curves at Gries and Klagenfurt in the Tyrol, and at Cordova in the Argentine Eepublic, are specially examined.

The most noticeable feature of these daily barometric oscillations is their very large amounts, those at Gries, for example, though in lat. 46° 30′ N., being quite tropical in amount; and the singular circumstance is that in no season does the morning minimum fall so low as the daily mean. Gries, Klagenfurt, and Cordova are each situated in a deep valley.