02152cam a22003133u 450000100060000000300070000600500170001300600020003000700050003200800410003704000110007804100170008905000070010610000160011324500380012924600330016726400510020030000470025133600260029833700260032433800360035050000310038650801150041752011470053253400450167965300340172465300370175885600430179553214UtSlPG20260610134227.0mcr n260607r2016||||utu|||||o|||||||||||||| d  aUtSlPG 7aen2iso639-1 4aPZ1 aPowell, Van14aThe Mystery of the Fifteen Sounds1 aThe Mystery of the 15 Sounds 1aSalt Lake City, UT :bProject Gutenberg,c2016  a1 online resource :bmultiple file formats  atextbtxt2rdacontent  acomputerbc2rdamedia  aonline resourcebcr2rdacarrier  aRelease date is 2016-10-05  aProduced by Stephen Hutcheson, Dave Morgan and the Online
Distributed Proofreading Team at http://www.pgdp.net  a"The Mystery of the Fifteen Sounds" by Van Powell is a children's adventure novel written in the late 1930s. The story centers on young Roger Brown, who aspires to be a "Modern Pioneer," inspired by his father’s expedition to Borneo. Throughout the novel, Roger collaborates with his cousin Grover, who runs a scientific research laboratory, to solve complex mysteries involving scientific principles, including the disappearance of dangerous inoculated rats and the mysterious "Voice of Doom."  The opening of the story establishes a sense of urgency as Roger discovers that alarms have gone off in his cousin’s laboratory. He insists to Grover that something is awry, especially with the sudden quiet of the alarms. As they investigate, they find that the laboratory's white rats, carrying dangerous pathogens, have vanished. The plot unfolds with hints of mystery, danger, and adventure as Roger and Grover confront challenges that combine both science and intrigue, leading them into various thrilling scenarios while trying to uncover the truth behind the strange occurrences in the lab. (This is an automatically generated summary.)  nOriginal publication data not identified  aDetective and mystery stories  aLaboratories -- Juvenile fiction40uhttps://www.gutenberg.org/ebooks/53214