Encyclopaedia Britannica: http://www.1902encyclopedia.com/F/FLI/flight-flying-machines.html
11.4.14
Lighter than air
It has been asserted, and which some degree of plausibility, that a fish lighter than the water might swim, and that a bird lighter than the air might fly; it ought, however, to be borne in mind that, in point of fact, a fish lighter than the water could not hold its own if the water were in the least perturbed, and that a bird lighter than the air would be swept into space by even a moderate breeze without hope of return.
