Pressure Waves

Famous quotes containing the words pressure and/or waves:

“Osteopath—One who argues that all human ills are caused by the pressure of hard bone upon soft tissue. The proof of his theory is to be found in the heads of those who believe it.”
—H.L. (Henry Lewis)

“O beautiful for spacious skies,
For amber waves of grain,
For purple mountain majesties
Above the fruited plain!”
—Katharine Lee Bates (1859–1929)