Authorities, surviving family disagreed on not guilty verdict Written By: Erik Kaufman | ×
The home of John Mathis, eight miles north of Mount Vernon, is pictured in this Republic file photo. The farm was the site of a triple homicide nearly 40 years ago. (Chris Huber/Republic)
MOUNT VERNON, S.D. It was an ugly scene at the Mathis farm outside of Mount Vernon Sept. 8, 1981.
When police were called to the location that night, John W. Mathis was sitting on a bed in the metal shed he and his family were living in after a pair of fires had destroyed their home earlier in the year. His left arm was bleeding from a gunshot wound.
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IMAGE: Georgia Tech researcher Jean C. Rivera-Rios obtains air samples from an office on the campus of the Georgia Institute of Technology. view more
Credit: John Toon, Georgia Tech
If you re looking for an indoor space with a low level of particulate air pollution, a commercial airliner flying at cruising altitude may be your best option. A newly reported study of air quality in indoor spaces such as stores, restaurants, offices, public transportation and commercial jets shows aircraft cabins with the lowest levels of tiny aerosol particles.
Conducted in July 2020, the study included monitoring both the number of particles and their total mass across a broad range of indoor locations, including 19 commercial flights in which measurements took place throughout departure and arrival terminals, the boarding process, taxiing, climbing, cruising, descent, and deplaning. The monitoring could not identify the types of the particles and therefore does not provide