Plate XVIII. No. 1. St. Marys River, Michigan. Speed of boats turning angle

1905

United States. Board of Consulting Engineers for Panama Canal

1:2k

Lake George

1951

1:63k

St Marys River From Twin Islands to Sault Ste Marie

1902

1:40k

St Marys River From Twin Islands to Sault Ste Marie

1898

1:40k

St Marys River Twin Islands to Sault Ste Marie

1921

1:40k

St. Mary's River From Lake Superior To Lake Huron

1855

Colton, J.H.

1:180k

Chippewa County, Michigan.

1936

Upper Peninsula Development Bureau

Drummond

1984

1:100k

Drummond

1984

1:100k

Upper Peninsula, scale six miles to an inch (Chippewa and Mackinac counties)

1873

Walling, H. F.

1:380k