Laxey agreement that it should be kept in perpetual running order for the people of the Isle of Man. In 1965 the Isle of Man Government bought the wheel and the site. Restoration work began, and in 1989 it was put under the control of Manx National Heritage. Great Laxey Mine Railway re-opened with two small steam engines in September 2004 to carry passengers along the restored route. Laxey is the site of King Orry's Grave. The Laxey Woollen Mills were founded in 1881 by Egbert Rydings, supported by John Ruskin, and were originally water powered. The mills are known for
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