The Museum no longer maintains a list of web links. There are many online resources on the history of science available elsewhere on the web. The one closest in spirit and coverage to the Museum’s interests in historic scientific instruments is maintained by Tom Settle and hosted by the Istituto e Museo di Storia della Scienza in Florence: http://www.imss.fi.it/~tsettle/index.html
The Museum does however host an electronic mailing list devoted to the history of scientific instruments. For further details see the rete page.