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Waikato Times, Volume 94, Issue 14584, 5 February 1921, Page 12 (Supplement)

The soaring flight of birds which is most frequent in the tropical regions lias been examined by scientists lately, and it has been found that the air lias a vertical ascending component, in the regions where this Might is mostly observed. In other words, 'the wind blows vertically upwards hard enough to keep the birds in suspension, as in the case of a parachute. The conclusion is new that the wind in these regions nearly always lias a vertical component in places; to find and use It the birds seem to be limited to the zones having these ascending components. Of course, the object of the bird is to keep in the rising zone, and if its flight enters a descending zone it will turn its course and recover its zone of supporting air. This accounts for their apparently unaccounted for turns, and the old idea expounded by Langley, that the soaring can l" 1 " accounted for by the sudden changes in velocity of wind is petty definitely abandoned by these observers. In Germany the govt pas holders are cheaply protected from rusting hy putting a layer of oil Ins:-, than half an inch thick on the water in the tank. A, the holder rises it carrip* up vvilh it. a coating of Hip oil whiHi protects It perfectly. The expense is a ?u\'il* fraction of that of painting. 'it courie, the part which does not, descend into the water must be painted.