[3] The V-I (velocity-intensifier) unit is an invention of Lt. Lancelot Biggs which permits space-craft to attain velocities approaching the "limiting velocity" of light, i.e., approximately 186,000 miles per second.—ED.

[4] Science has already discovered that the bombardment of cosmic rays is at least partially responsible for the creation of "freaks," "sports," or "mutants," in both the animal and vegetable world. Life on atmosphere-blanketed planets is not subject to this bombardment, because of the protective Heaviside energy layer ... but space-craft must be carefully shielded from such radiation.—ED.

[5] "Although the attempt has often been made to produce a blue rose, no one has ever succeeded.... The reason a blue rose has never been produced is that blue has never arisen spontaneously in the Genus Rosa, and no blue flower of another genus has ever been found that will ... transfer its blue color to the latter. A breeder who could do this would ... make a fortune." Gager: The Plant World.—ED.

[6] "Sunlight, as Sir Isaac Newton discovered, is a combination of the seven colors that compose the spectrum. An object is red because it is so constituted that it reflects the red rays of a beam of sunlight but absorbs all others ... a lily is white because it reflects all the rays ... a buttercup is yellow because it reflects only the yellow rays, absorbing all others ... an object is black because it absorbs all the colors of the spectrum." Gager: The Plant World.—ED.