There are various reasons, both practical and theoretical, which make desirable the location of the hyperbolic point as well as the “eye” of a hurricane. The practical difficulty in the location of the hyperbolic point which stems from its generally being in an extensive area of very light winds is easily overcome by the use of smoke bombs. Several flights made during August and September of 1954 demonstrate this.

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* The work here reported was supported by the Air Force Cambridge Research Center through its contract AF 19 (604)-753 with Florida State University.