By Harry Collingwood ________________________________________________________________________ This book has a firm place in British literature, for it was one of the very first in the genre of science-fiction. A German professor, living for some reason in London, takes on some adventurous and rich Englishmen, and sets off with them in an airship that is made of a material so light that it can rise vertically into the air if you pump out some of the air in its ballast tanks. It can also plunge into the depths of the ocean, because this special material, aetherium, is so strong that it can withstand water pressure to a great depth.…
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