‘Detail fig 8 from patent for Gravity Ventilator 3-19-1965’

Detail fig 8 from patent for Gravity Ventilator 3-19-1965

Mississippi River Basin Model Cleanup January 3, 2026 at 8:00 am – 12:00 pm Buddy Butts Park, 6180 McRaven Rd, Jackson, MS 39209, USA Please join us for our monthly clean up event. We are working to take back the model from the overgrowth. We have several types of activities from removing dirt, debris on the panels to cutting down and removing invasive trees. Activities for all ages including kids who can help with littler prevention.

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Preservation in Mississippi