The National Geographic Magazine, Volume 100National Geographic Society, 1952 - Geography Indexes kept up to date with supplements. |
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Page 46
... lights and water . So complex is the board that Brewer still discovers new com- binations for water patterns . The color switches are so finely graduated that the oper- ator can make light changes that the human eye cannot detect . When ...
... lights and water . So complex is the board that Brewer still discovers new com- binations for water patterns . The color switches are so finely graduated that the oper- ator can make light changes that the human eye cannot detect . When ...
Page 641
... light , this strained network of atoms vibrates and gives off visible light , causing the specimens to glow like hot coals . Many minerals which are ordinarily dull and drab looking are transformed by fluores- cence into dazzling ...
... light , this strained network of atoms vibrates and gives off visible light , causing the specimens to glow like hot coals . Many minerals which are ordinarily dull and drab looking are transformed by fluores- cence into dazzling ...
Page 759
... light emitted by atoms of a new kind of man - made mercury . Its chem- ical name is mercury 198. All light moves in waves , like waves in water , and wavelength is the distance between the crests of two waves . The wavelength of the green ...
... light emitted by atoms of a new kind of man - made mercury . Its chem- ical name is mercury 198. All light moves in waves , like waves in water , and wavelength is the distance between the crests of two waves . The wavelength of the green ...
Contents
Around the World in Eighty Days By Newman Bumstead With 34 illustrations | 9 |
Colorados Friendly Topland Rocky Mountains By Robert M Ormes With 19 illus | 11 |
Biggest Little Library in the World By Joseph T Foster 411 | 11 |
Copyright | |
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