| Id Number | 227 |
| Object Title | Micrologger |
| Manufacturer | Campbell Scientific, Inc. |
| Date of Object | Unknown |
| Model | 21X |
| Serial Number | 8495 |
| Dimensions | 20.5 x 14.5 x 8 cm; 8'' x 5 3/4'' x 3'' |
| Material | Metal |
| Id Number | 228 |
| Object Title | Micrologger |
| Manufacturer | Campbell Scientific, Inc. |
| Date of Object | Unknown |
| Model | CR21 |
| Serial Number | 1761 |
| Dimensions | 20.5 x 14.5 x 7 cm; 8'' x 5 3/4'' x 2 3/4'' |
| Material | Metal |
| Id Number | 225 |
| Object Title | Galvanometer |
| Manufacturer | Bechman Instruments Inc. |
| Date of Object | September 6, 1957 |
| Model | 300 |
| Serial Number | 464 |
| Dimensions | 22.5 x 15 x 19 cm; 9'' x 6'' x 7 1/2'' |
| Material | Wood; Plastic |