| Id Number | 68 |
| Object Title | Assman Psychrometer |
| Manufacturer | Sato Keiryoki Mfg. Co. Ltd. Japan |
| Date of Object | November, 1986 |
| Model | Unknown |
| Serial Number | 7380 |
| Dimensions | 40.5 x 10 cm; 16'' x 4'' |
| Material | Metal; Plastic |
| Id Number | 69 |
| Object Title | Mill Hygrophant |
| Manufacturer | Casartelli |
| Date of Object | 1840 |
| Model | Unknown |
| Serial Number | 8652 and 21633 |
| Dimensions | 41.5 x 19.5 x 8 cm; 16 1/4'' x 7 3/4'' x 3 1/4'' |
| Material | Wood; Metal; Ceramic; Glass; Paper |
| Id Number | 70 |
| Object Title | "Edney" Sling Hygrometer |
| Manufacturer | John Davis and Son Ltd. |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | D8618; D8135 |
| Dimensions | 21 x 4 x 1 cm; 8 1/4'' x 1 1/2'' x 3/8'' |
| Material | Metal; Glass; Plastic; Mercury; Cloth |