A majority of the material in this series is in the form of photographic negatives rather than prints. Boxes 100 to 106 contain mostly 35mm, 2 1/2" x 2 1/2" and 4" x 5" negatives, with some contact prints. Negatives were transferred from their original envelopes to acid neutral envelopes, but were kept in their original order; original descriptions were also retained. The envelopes were placed in folders according to subject, and in many cases more than one envelope on the same subject was placed in the folder. Photographs are of the smelter, zinc plant, research labs and fertilizer plant, concentrator and mine area, coast operations, and Crescent mine. Another group of negatives were taken for the Bunker Hill Reporter, although not all shots were used in the newsletter. Approximately 100 identifiable nitrate negatives from the Mine and Mill series (series K, box 105) were separated from the collection and will be copied onto safety film at a later date. Negatives which showed signs of severe deterioration were disposed of by the University safety office.

There is also a group of glass negatives. Unfortunately many of these have been badly scratched, others are cracked or broken. None were identified. Some are pictures of the Bunker Hill mine, others are of people and events.

Other negatives include copy negatives of aerial views of the Kellogg operations, and other negatives, some in color, of the plant.

The slides were placed in plastic slide pages, with 20 slides to a page. Most slides are of the smelter, mine, concentrator and the offices of the Pacific Division.

The final items in this series include a notebook containing photographs of trucks and graders, possibly at the Cortez mine, negatives and prints of the official opening of the Cortez mine in 1969, pictures of Gulf Resources executives, and a printing plate for a $5.00 Bunker Hill check.