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Dimensions: height: 101.6 cm (40 in); width: 86.3 cm (33.9 in) Collection: University of Edinburgh ... Description=John Reid (also known as John Robertson) (1721-1807 ...
Robertson was born in 1879 in Seneca Township, Ontario, part of the historic Haldimand County, [2] as one of six children to parents John and Annie (née Brown) Robertson, both of Scottish heritage. [ 2 ] [ 3 ] [ 4 ] His father left the family to pursue the Gold Rush at the time, and died in 1886.
A Robertson screw, also known as a square screw [1] or Scrulox, [2] is a type of screw with a square-shaped socket in the screw head and a corresponding square protrusion on the tool. Both the tool and socket have a slight taper .
The Robertson graph is the unique (4,5)-cage graph and was discovered by Robertson in 1964. [4] As a cage graph, it is the smallest 4-regular graph with girth 5. It has chromatic number 3, chromatic index 5, diameter 3, radius 3 and is both 4-vertex-connected and 4-edge-connected. It has book thickness 3 and queue number 2. [5]
A sphere is a 2 dimensional surface embedded in a 3 dimensional space. The radius of a sphere lives in the third dimension: it is not part of the 2 dimensional surface. However, the value of this radius affects distances measure on the two dimensional surface.
His childhood nickname was "Headster", which McDonough says originated in his brothers' teasing him about the size of his head. [4] He graduated from Barnstable High School , and attended Syracuse University , where he was initiated and became a member of the Sigma Chi Fraternity and graduated with a Bachelor of Fine Arts degree in 1988.
The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.
The silver-colored Susan B. Anthony dollar was replaced with gold-colored Sacagawea dollar in 2000 and Presidential Dollars 2007-2016; though the composition changed, the coin's size and weight remain the same. Some variances in coin size and weight occurred over time, especially as the value of silver varied.