The Planet of Romance - Robert Stawell Ball

The intrinsic brightness of the Sun is fully 5,000 times as great as if the whole surface were formed of the molten steel just issuing from the Bessemer converter.

All screws of a given pitch belonging to a system of the third order are the generators of a certain hyperboloid. There is... a different hyperboloid for each pitch. ...all these hyperboloids are concentric.

The problem that first demands solution is to discover the disruptive agent which would be potent enough to rip the Cloghvorra Stone from its parent bed, to bear it down the valley for miles, and to cast it on the mountain side.