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Lowe intended to build the rail system all the way to the top of Mount Wilson along with additional hotels and facilities on the top. Later, much of the path of the large 100-inch telescope and observatory built on Mount Wilson was used to transport the delicate 100-inch (2,500 mm) mirror to the top of Mount Wilson.
A Gunter's chain showing the individual links. The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. In US customary units modern definition, the link is exactly 66 ⁄ 100 of a US survey foot, [1] or exactly 7.92 inches or 20.1168 cm.
Common sizes are from 9 ⁄ 16 to 10 ⁄ 16 inch (14 to 16 mm) square and 5 + 1 ⁄ 2 to 6 inches (140 to 150 mm) long. [10]: 582–583 A rail spike is roughly chisel-shaped and with a flat edged point; the spike is driven with the edge perpendicular to the grain, which gives greater resistance to loosening. [11]
The American Society of Civil Engineers (or ASCE) specified rail profiles in 1893 [20] for 5 lb/yd (2.5 kg/m) increments from 40 to 100 lb/yd (19.8 to 49.6 kg/m). Height of rail equaled width of foot for each ASCE tee-rail weight; and the profiles specified fixed proportion of weight in head, web and foot of 42%, 21% and 37%, respectively.
In 1967 Greg created a back pack, named the Expedition Pack, with internal phenolic resin laminate stays, later revised to 6061 aluminium flat bar, being a frame which facilitated the carrying of heavy loads and a unique chest strap designed to attach to a haul rope while still wearing the pack.
Track where the rails are spaced farther apart than standard gauge, or 1,435 mm (4 ft 8 + 1 ⁄ 2 in) [22] Bubble car A nickname for a British Rail Class 121 railcar [36] Buckeye coupler A side-operated version of the top- or bottom-operated Janney coupler [37] Buffer A device that cushions the ends of rail vehicles against each other.
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