Lake Geneva to swim at some beaches of the lake; indeed, visibility under water was near zero. By the 1980s, intense environmental pollution (eutrophication) had almost wiped out all the fish. Today, pollution levels have been dramatically cut back, and it is again considered safe to swim in the lake. Major leisure activities practiced include sailing, wind surfing, boating (including water skiing and wakeboarding), rowing, scuba diving and bathing. On a scientific footnote, in 1827, Lake Geneva was the site for the first measurement of the speed of sound in (fresh) water. French mathematician Jacques Charles François Sturm and Swiss Physicist Daniel
French Farm Lake were allowed to return to the public sector. The "French Farm Lake State Flooding Wildlife Management Area", a unit within the State Forest that is owned and managed by the Michigan Department of Natural Resources (M-DNR), is a parcel of land of 2,948 acres in extent. M-DNR maintains an earthen boat ramp close to the northern end of the lake, from which boaters can launch vessels and fish for bass and pike. The surrounding wetlands are breeding grounds for mallards and wood ducks. The lake's name may be derived from a frontier farm cultivated on the lakeshore in the 18th