Pyranograph 



52. A mechanical pyranograph, manufactured by the Weather Measure Cor- 

 poration, Sacramento, California, was located on the top of the weather in- 

 strument shelter and provided a record of the duration and intensity of solar 

 radiation. The pyranograph was not calibrated, but was observed to operate 

 in a reasonable manner. This equipment required that the glass cover be 

 cleaned, the chart paper changed every week, the timer wound, and the pen 

 inked. 



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