- Three plunging waterfalls at Wallace Falls State Park demand your attention—the largest one drops 265 feet down a backdrop of dark, hackly rocks speckled with bright green moss. The Middle Falls viewpoint offers not only excellent views of the waterfall, but also a panorama of the glacially-carved Skykomish River valley and the distant peaks of the Olympic Mountains. The park is also a popular recreational area. Enjoy rushing mountain streams flowing through misty conifer forests as you explore 20 miles of hiking trails. Find a camping spot and leave the crowds behind by making the trek up to Wallace Lake for a day of fishing. The beautiful views, well-maintained trails, and accessibility (the trailhead is only about an hour from Seattle by car) draw crowds year round. The area is therefore extremely popular, but note that parking is limited. Plan your visit during non-peak times for your best chance at solitude.
- The origins of 60-Hz as a power frequency (ieeexplore.ieee.org)
In 1891, Westinghouse engineers in Pittsburgh selected 60 Hz as their new power frequency. That same year, AEG engineers in Berlin selected 50 Hz as their new power frequency. Although much has happened since 1891, these two frequencies remain the principal power frequencies in use worldwide. Many people continue to be affected by the decisions on frequency standards made so very long ago. The author discusses the origins of 60 Hz as the power frequency now used in the USA. The author covers the work of Charles Scott, Benjamin Lamme and L.B. Stillwell of Westinghouse, the experimental period of 1821 to 1880, the light period from 1880 to 1890, the power and period of 1890 to 1925, and the period of systems interconnection from 1925 to 1990. Particular emphasis is given to the development of frequency for lighting systems and of frequency development in the USA, Europe and Japan.