Cycles of Drought And Good Seasons in South Africa: With Cyclical Diagrams.
Cycles of Drought And Good Seasons in South Africa: With Cyclical Diagrams.
D E David Ernest Hutchins
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Lastly, some of the facts given below, such as where an isolated drought occurs at a minimum period are of course simply suggestive. Gustav Wex examined the recorded depth of water in the Danube, Rhine, and other European rivers between 1800 and 1867. He found that there was more water in these rivers in maximum sunspot years. If he had failed to trace the correspondence, it would have been no evidence one way or the other, till we had ascertained what was the nett result of solar energy, on th...e snowclad mountains where these rivers rise, as well as on the rainfall. The same remark applies to Mr. Dawson's discovery that the average water level in the great American lakes varies with the sunspot cycle. Bret Harte in his " Notes by flood and field *' gives a graphic description of the great floods in the Sacramento Valley in California. These floods occurred in 1859 — 60. The cyclical diagram for Cape Town shows that 1859 — 60 are the Storm cycle years of floods and heavy rains at the Cape.
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