Scope and Contents From the File: Arrangement: By type, then numerically or alphabetically by letter or number. See description below. Indexes appear at the front of most books and have been microfilmed separately to provide some access to the entire series. Books are arranged in the following order: numerical series (1 – 36) for sanitary sewers; alphabetical series for water supply lines (A - Z); main numerical series (2 – 140; 320 - 732 [not inclusive] for various projects; miscellaneous series (see listing at head of...