One Saturday afternoon, a close neighbor was observed to return home on a beautiful afternoon and to start a file. After a while the wind changed direction and he let the file burnout while he went out. Later in the evening he returned home again and relit his fire. Fortunately, the nephelometer was running on our back porch through out the episode. Here is a record of the particulate pollution that was measured.
(Y-axis is Micrograms per Cubic Meter: X-axis is Time of Day)
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