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Descriptor English:   Heliograph 
Descriptor Spanish:   Heliógrafo 
Descriptor Portuguese:   Heliógrafo 
Tree Number:   SP8.473.654.692.777.614
Definition English:   An instrument that measures the number of hours that the sun illuminates a place during the day. It also measures infrared radiation emitted by the sun. (Free translation from the original: Material IV - Glosario de Protección Civil, OPS, 1992) 
Record Number:   34854 
Unique Identifier:   DDCS034854 

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