Carleton College is the home of the historic Goodsell Observatory. The Instrument Shop is responsible for the care and preservation of the instruments used in the observatory in its early days when it was an important research location and center for time keeping.
- E. Howard Clock Serial Number 195 is the sidereal clock in the Goodsell rotunda.
- E. Howard Clock Serial Number 196 is the solar clock in the Goodsell rotunda.
- The Riefler Tank clock, SN 227.
- Images of the Carleton E. Howard model number 89, before and after cleaning.