sentences:  The inventor is not named, but Booth's description of the machine conforms fairly closely to American inventor John S. Thurman’s blown air design.Booth watched a demonstration of the device, which blew dust off the chairs, and thought that "...if the system could be reversed, and a filter inserted between the suction apparatus and the outside air, whereby the dust would be retained in a receptacle, the real solution of the hygienic removal of dust would be obtained.