Re "Lake's clarity shows gains for a second year" (Our Region, Feb. 28): The article did not tell the whole story. Lake Tahoe was first tested by John LaConte in 1873 when the clarity/turbidity reading was 108 feet. He used a 9.5 inch dinner plate.
The "Secchi disk," which has been used to measure Lake Tahoe's clarity since 1968, was created in 1865 by Pietro Angelo Secchi, a Jesuit theologian and Italian astronomer.
-- Mary Coverdale, Stockton