The boy's book of new inventions (1912)

Document in PDF: http://archive.org/details/boysbookofnewinv00maul

For heroic devotion to science in the face of danger and the scorn of their fellowmen, there is no class wTho have made a better record than inventors. Most inventions, too, are far more than scientific calculation, and it is the human story of the various factors in this great age of invention that is here set forth for boy readers. New discoveries, or new applications of forces known to exist, illustrating some broad principle of science, have been the chief concern of the author in choosing the subjects to be taken up in the various chapters, so that it has been necessary to limit the scope of the book, except in one or two instances, to inventions that have come into general use within the last ten years.