[word=pipes] □ □
[word=pipes] [□] □
[word=pipes] □? □
Joint packings for pipes , junctions for pipes , not of metal , watering hose , hoses of textile material , fire hose , pipe jackets , not of metal , connecting hose for vehicle radiators ; shock-absorbing buffers of rubber , rubber stoppers , sleeves of rubber for protecting parts of machines , stuffing of rubber or plastic , gaskets , rings of rubber , cylinder jointings , water-tight rings , reinforcing materials , not of metal for pipes . This includes the nature of wave motion as produced by vibrating strings and organ pipes , as well as harmonic content , musical scales and intervals , and the mechanism of the hearing process . He may allude to the facility of communicating motion to levers , forces , pistons , or plungers , in any direction , by turning on steam to variously arranged pipes , so that to his mind it appeared as though it were something of super-human origin .