All observations are liable to error; no telescope is perfect, no leveling instrument entirely trustworthy; no instrumental graduations are exact and no observer is infallible.


A Sketch of the Geography and Geology of the Himalaya Mountains, and Tibet, Chapter 4 (p. 23)

Horace H. Hayden Quotes

All observations are liable to error; no telescope is perfect, no leveling instrument entirely trustworthy; no instrumental graduations are exact and ...

All observations are liable to error; no telescope is perfect, no leveling instrument entirely trustworthy; no instrumental graduations are exact and ...

All observations are liable to error; no telescope is perfect, no leveling instrument entirely trustworthy; no instrumental graduations are exact and ...

All observations are liable to error; no telescope is perfect, no leveling instrument entirely trustworthy; no instrumental graduations are exact and ...