Scope and Contents It is important to note that the survival of the various types of documentation across the nearly 140 years of its existence is very uneven. There are large gaps in each of the series. T he minutes of the Board of Directors, for example, is virtually complete for the period from 1898 through 1947 and virtually non-existent for the period before that. The same disparity holds true for most of the other series. There has been significant physical damage to many of records, especially the...