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2. Threshold (architecture) - Wikipedia

   en.wikipedia.org/wiki/Threshold_(architecture)

   A worn-out wooden threshold. A threshold is the sill of a door. Some cultures attach special symbolism to a threshold. It is called a door saddle in New England. [citation needed] Door thresholds cover the gap between the floor and the door frame, helping to prevent any water leaks, insects or draughts from entering through the opening.

3. Economic and logistical aspects of the Napoleonic Wars

   en.wikipedia.org/wiki/Economic_and_logistical...

   The Napoleonic army on campaign, according to Jacques Swebach.. The economic and logistical aspects of the Napoleonic Wars describe all the economic factors involved in material management—economic policies, production, etc.—and financial management—funding war expenditures, etc.—of the wars conducted under the Consulate and the First Empire, as well as the economic causes and ...

4. Church Street Station - Wikipedia

   en.wikipedia.org/wiki/Church_Street_Station

   Church Street Station, also called the Old Orlando Railroad Depot, is a historic train station and commercial development in Orlando, Florida. The historic depot and surrounding buildings house a retail and entertainment center. The complex also contains a stop for SunRail, the commuter rail service of the Greater Orlando area.

5. Saddle roof - Wikipedia

   en.wikipedia.org/wiki/Saddle_roof

   A saddle roof is a roof form which follows a convex curve about one axis and a concave curve about the other. The hyperbolic paraboloid form has been used for roofs at various times since it is easily constructed from straight sections of lumber, steel, or other conventional materials. [ 1 ]

6. Saddle point - Wikipedia

   en.wikipedia.org/wiki/Saddle_point

   A saddle point (in red) on the graph of z = x 2 − y 2 (hyperbolic paraboloid). In mathematics, a saddle point or minimax point [1] is a point on the surface of the graph of a function where the slopes (derivatives) in orthogonal directions are all zero (a critical point), but which is not a local extremum of the function. [2]

7. Regular Northwest Face of Half Dome - Wikipedia

   en.wikipedia.org/wiki/Regular_Northwest_Face_of...

   The Regular Northwest Face of Half Dome was the first Grade VI big wall climbing route in the United States. It was first climbed in 1957 by a team consisting of Royal Robbins, Mike Sherrick, and Jerry Gallwas. Its current aid climbing rating is VI 5.9 A1 or 5.12 for the free climbing variation. [1]