From the moment they had left the Earth, their own weight, and that of the Projectile and the objects therein contained, had been undergoing a progressive diminution. . . . Of course, it is quite clear, that this decrease could not be indicated by an ordinary scales, as the weight to balance the object would have lost precisely as much as the object itself. But a spring balance, for instance, in which the tension of the coil is independent of attraction, would have readily given the exact equivalent of the loss.

I wanted to see what no one had yet observed, even if I had to pay for this curiosity with my life.

Man is never perfect nor contented.

[we see that] science is eminently perfectible, and that each theory has constantly to give way to a fresh one.

Anything one man can imagine, other men can make real.

I have always made a point in my romances of basing my so-called inventions upon a groundwork of actual fact, and of using in their construction methods and materials which are not entirely without the pale of contemporary engineering skill and knowledge.

Is the Master out of his mind?' she asked me. I nodded. 'And he's taking you with him?' I nodded again. 'Where?' she asked. I pointed towards the centre of the earth. 'Into the cellar?' exclaimed the old servant. 'No,' I said, 'farther down than that.