- Fremont Bridge (historylink.org)
The Fremont Bridge, the first double-leaf bascule drawbridge spanning the Lake Washington Ship Canal, opened June 15, 1917, 19 days before the Government Locks at Ballard were officially dedicated. The bridge links the neighborhoods of Fremont and north Queen Anne, previously connected by a streetcar-carrying wooden trestle.
- Manganese (Wikipedia)
Manganese is a chemical element; it has symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese was first isolated in the 1770s. It is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide.