Word: spectrum
(lookup in dictionary)
(lookup stats)
Dates: during 1900-1909
Sort By: most recent first
(reverse)
...PHYSICAL COLLOQUIUM. "Wood: on a Balmer Series in the Sodium Spectrum." "Lebedew: on the Apparent Dispersion of Light in Space." Professor Lyman. Jefferson Physical Laboratory, Room...
...PHYSICAL COLLOQUIUM. "The Formation of Metallic Vapor in the Spark and the Nature of its Spectrum." Mr. W. O. Sawtelle. Jefferson Physical Laboratory, Room...
...PHYSICAL COLLOQUIUM. "The Formation of Metallic Vapor in the Spark and the Nature of its Spectrum." Mr. W. O. Sawtelle. Jefferson Physical Laboratory, Room...
...PHYSICAL COLLOQUIUM. "Radio-active Change," Mr. Hodge; "The Secondary Spectrum of Hydrogen," Dr. Lyman. Jefferson Physical Laboratory, Room...
...those who grope in the shadow of uncertainty, the analogy between human life and the spectrum of light is comforting. We can see but a small part of the rays; those which give the shades of color, while the rays which come before and after the spectrum are invisible. Thus it is with life--the unknown past, the illuminated present, and the unseen future of human existence should not make us doubt the reality of what we cannot see. Out eyes and ears are finite, and receive no impressions of infinite things. They dupe us, and make us blind...