Theories of domestic catâs For decades, many theories have existed to explain the origin of cats. Traditionally, most scholars believed that all domestic cats had a common ancestor in ancient Egypt, where cats were domesticated around 3,600 years ago. Other researchers believed that domestic cats had more than one ancestor, the result of domestication occurring at different times and places, each resulting in a distinct ancestral breed 1.
Railroads usually consider a 100 ft. width of right of way centered about their main track centerline as the minimum on which they can effectively operate. Any encroachment within this limit, even if it is only for ditch cleanout or erosion control, is not welcomed by the railroad and therefore is to be avoided.
The gate was to be 3 1/2 (90mm) thick and I wanted the gate 1 3/8 (35mm) in from the posts, therefore the center of the track would be 2 1/2 (63mm) in from the posts. I used a straight piece of wood as a platform for the cutting saw to run on. I determined the height with a string line and level.