In addition, there are a number of items where the essential correctness of the concept may be concealed from the reader by the terms employed in this book--for it is not granted to prophets to foresee what words will be employed when inventors designate their products. The "glass" furniture (p. 25) has been made good in the form of plastics--which are, technically, glasses. Fluorescent lighting appears on p. 30 under the name of "luminor." The electric elevator (p. 43) has not turned up as an elevator, but its mechanism is used to drive the electric torpedoes which sank much of the Japanese merchant marine during the war. Newspapers are printed on microfilm on p. 46, and the trans-Uranium elements show up on p. 53. Baseball and football are played at night on p. 80 and paper is made from straw on p. 104. A device which is essentially the radio-direction-finder is on p. 120, and on p. 128 there is a recording mechanism which differs from today's wire-recorders only in employing a strip of paper scanned by light, and which has since been built. This by no means exhausts the list, but it would detract from the reader's enjoyment not to allow him to make some discoveries for himself. To be sure, there are certain inaccuracies. The underearth tube from France to New York does not seem a good engineering proposition today. Nobody understood the nature of radium emanation in 1911 and neither did Mr. Gernsback. But the percentage of accurate judgments (one cannot call them guesses, when they are so numerous and so close to the mark) is somewhere up in the nineties. Which leads one to the thought that this book perhaps has an importance beyond that as a literary and historical curiosity. Not all the predictions have been fulfilled or placed beyond fulfillment; and if research had proceeded along the lines of (for instance) Mr. Gernsback's suggestion for radar, we might have had that device a good deal earlier. In _Ralph 124C 41+_ the weather is under complete control. We seem to be edging in that direction, but maybe a little more push is needed--the kind of push that could be supplied by a book like this. Medical research has now caught up with Gernsback by deciding that thought in the human brain is accompanied by electrical manifestations; on p. 48 this concept has advanced to the point where thoughts can be recorded on a tape in the form of interpretable graphs, and it may become true in practice if someone works on the problem. The idea of draining off all the blood from a living body for purification and then replacing it (transfusion also ranks as a Gernsback prediction) is today far from fantastic. It is the standard and only treatment for RH newborn infants.