ly the concavity of the blades. The whole is arranged the quantity is in excess of this amount. so as to fold into a small space when not in use. With In order to make the oil thin and active in move- this form of deviator it is necessary, in order to change ment, it is customary in California to… … ward pull which compensates for the up- and the trip began October 13. THE “SERPENTS” USED IN STEERING. ward pull of the rope, and this is the same M. Hervé has been working on the prob- at all speeds, according to the well-known laws of lem of steering balloons upon the sea for a number his…
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