Small Objects and Maps
Observing a nearby small object without a magnifying glass or a microscope, the optimal distance is 20–25 cm. At this close range, 0.05 mm can be seen clearly. The accuracy of a measurement ranges from 0.1 to 0.3 mm and depends on the experience of the observer. The latter figure is the usual positional accuracy of faint details in maps and technical plans.
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Famous quotes containing the words small, objects and/or maps:
“The only government that I recognizeand it matters not how few are at the head of it, or how small its armyis that power that establishes justice in the land, never that which establishes injustice.”
—Henry David Thoreau (18171862)
“Little minds mistake little objects for great ones, and lavish away upon the former that time and attention which only the latter deserve. To such mistakes we owe the numerous and frivolous tribe of insect-mongers, shell-mongers, and pursuers and driers of butterflies, etc. The strong mind distinguishes, not only between the useful and the useless, but likewise between the useful and the curious.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (16941773)
“And at least you know
That maps are of time, not place, so far as the army
Happens to be concernedthe reason being,
Is one which need not delay us.”
—Henry Reed (19141986)