Physical Tree Topology

Famous quotes containing the words physical and/or tree:

“The preservation of health is a duty. Few seem conscious that there is such a thing as physical morality.”
—Herbert Spencer (1820–1903)

“On a tree by a river a little tom-tit Sang “Willow, titwillow, titwillow!”
And I said to him, “Dicky-bird, why do you sit Singing, “Willow, titwillow, titwillow!””
—Sir William Schwenck Gilbert (1836–1911)