tainty applies to automobiling. Few people who have one or two cars can say exactly what a year's operation costs, when depreciation, replacement and performance are figured. The cost of upkeep of any machine depends in a great measure upon the amount of time the owner himself devotes, or has devoted, to its care and the degree of skill employed. Withal, I believe that the maintenance of a plane is probably very little greater than that of a similarly priced automobile.
There is a belief, I suppose (and perhaps it is well founded) that women shrink more than do men from the alleged hazards of aviation. Inheritance, training and environment seem to make women less aggressive than men, although in real courage I think they are equals. So much of woman's excitement through the ages has been pushing the men into adventure that they have the habit of hanging back a little. We can't infer Lady Macbeth lacked courage or
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