Laxey Mine ton, and this would be used to glaze lower end earthenware. During the height of prosperity of the Great Laxey Mine, the Laxey Wheel was erected. The wheel was named the Lady Isabella, after the wife of Sir Charles Hope, who at the time was the Lieutenant Governor of the Isle of Man. During its working life the wheel was capable of pumping 250 gallons of water a minute from a depth of 200 fathoms. By the beginning of the 20th Century the yield from the mine had begun to decline dramatically. During the first six months of 1900 the
Table of the largest known graphs of a given diameter and maximal degree Table of the largest known graphs of a given diameter and maximal degree In graph theory, the degree diameter problem is the problem of finding the largest possible graph for a given maximum degree and diameter. The Moore bound sets limits on this, but for many years mathematicians in the field have been interested in a more precise answer. The table below gives current progress on this problem (excluding the case of degree 2, where the largest graphs are cycles with an odd number of vertices). Below is the table of the vertex numbers for the best-known graphs (as of