952

On the encroachments of the sea on the land and vice versa.

OF WAVES.

A wave of the sea always breaks in front of its base, and that portion of the crest will then be lowest which before was highest.

[Footnote: The page of FRANCESCO DI GIORGIO’S Trattato, on which Leonardo has written this remark, contains some notes on the construction of dams, harbours &c.]

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

951 * 953

XIV * XVII

Notebooks of Leonoardo da Vinci

XVI: Physical Geography.

. . .

932

Of the surface of the water in relation to the globe.

933,

934,

935,

936

Of the proportion of the mass of water to that of the earth.

937,

938

The theory of Plato.

939

That the flow of rivers proves the slope of the land.

940

Theory of the elevation of water within the mountains.

941

The relative height of the surface of the sea to that of the land.

942,

943,

944,

945

Refutation of Pliny’s theory as to the saltness of the sea.

946,

947

The characteristics of sea water.

948,

949

On the formation of Gulfs.

950,

951

On the encroachments of the sea on the land and vice versa.

952,

953,

954

The ebb and flow of the tide.

955,

956,

957,

958,

959,

960

Theory of the circulation of the waters.

961,

962

Observations in support of the hypothesis.

963,

964,

965,

966,

967,

968,

969

On the way in which the sources of rivers are fed.

970

The tide in estuaries.

971

confluence.

972

. . .