permanent spring. Though we have comparatively little water or

tidal power, the earth's crust is so thin at this latitude, on

account of the flattening, that by sinking our tubular boilers

and pipes to a depth of a few thousand feet we have secured so

terrific a volume of superheated steam that, in connection with

our wind turbines, we shall have no difficulty in raising half a

cubic mile of water a minute to our enclosure, which is but

little above sea-level, and into which, till the pressure