Project Gutenberg 2025-02-05 Public domain in the USA. 203 Valkenstein, Kees 1862 1952 De verdwijn-machine $aUtrecht :$bW. de Haan, $c1917. Illustrated by the author. Jeroen Hellingman, Dwight Decker and the Online Distributed Proofreading Team at https://www.pgdp.net/ for Project Gutenberg "De verdwijn-machine" by Kees Valkenstein is a novel likely written in the mid-20th century. The story revolves around Professor Wells, who invents a mysterious machine capable of making objects invisible, stirring curiosity and skepticism among the public. As his device gains attention, a significant part of his invention disappears, leading him on a quest to reclaim it. At the start of the novel, we are introduced to the aftermath of a world war as people return to normal life, with an emphasis on innovation. Professor Wells's invention is showcased, but it soon becomes a point of intrigue when half of it goes missing. We also meet the Bruggemans family, who are vacationing in the Veluwe and include a curious boy named Koen. While exploring the woods, Koen discovers a mysterious box containing the remains of the disappear machine, subsequently experiencing the astonishing effects of invisibility, both with objects and his interactions with his friend Piet. The opening sets up a blend of adventure and mystery surrounding the machine's capabilities and the adventures that will unfold. (This is an automatically generated summary.) 20240203021721valkenstei 1917 NL Reading ease score: 82.3 (6th grade). Easy to read. nl Science fiction Inventions -- Juvenile fiction Crime -- Juvenile fiction PZ Text Category: Adventure Category: Novels 436884 2025-06-29T14:47:58.835514 text/html 404187 2025-02-05T19:07:33 text/html 1366201 2025-06-29T14:48:10.948440 application/epub+zip 1365375 2025-06-29T14:48:03.110454 application/epub+zip 264997 2025-06-29T14:48:00.201499 application/epub+zip 2619363 2025-06-29T14:48:15.058404 application/x-mobipocket-ebook 2586187 2025-06-29T14:48:08.228455 application/x-mobipocket-ebook 357265 2025-06-29T14:47:57.727488 text/plain; charset=us-ascii 337452 2025-02-05T19:07:33 text/plain; charset=us-ascii 15755 2025-06-29T14:48:15.203387 application/rdf+xml 24587 2025-06-29T14:48:00.362488 image/jpeg 3537 2025-06-29T14:48:00.280476 image/jpeg 1902102 2025-06-29T14:47:58.896478 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog