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Table 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't exist
- Table 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't exist
Table 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't exist
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Table 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existTable 'db702206.fusion_errors' doesn't existEreignisse
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| 1 | 2 | 3 | 4 | 5 | ||
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Osobliwy zegar
Na paryzkiej wystawie nauki zastosowanej do przemys?u spotykamy nowo??, kt?ra niema?o budzi interesu: jest ni? zegar ?cienny, kt?rego cyferblat wyrobiono z massy daj?cej si?nazwa? sztucznym fosforem, ma ona bowiem t? w?asno??, i? w ciemno?ci najdoskonalej ?wieci. W?asno?? t? jednak traci ona po pewnym przeci?gu czasu; chc?c j? jej znowu nada?, trzeba j? wystawi? na dzia?anie promieni s?onecznych. Fosforescencya jest faktem oddawna w nauce znanym, zastosowanie jej tylko do budowy zegar?w nocnych jest nowym pomys?em, i przyzna? trzeba, wcale szcz??liwym.
„Bluszcz", 10 grudnia 1879 r.




