Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 3 · column 5 of 9 · from the scan, no model involved
way or the other, they all remove the much needed oxygen from the pond, the chief cause of fish-kill during hot dry months and hard cold winter. Insecticides, diseases and parasites can also cause fish-kill. Try to avoid building a fish pond directly below a field with heavy insecticide usage.
All animal life in your pond uses oxygen 24 hours a day. It is added to the water by surface absorption from the air and microscopic plants through photosynthesis. Oxygen is always lowest at daybreak.
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