| Id Number | 290 |
| Object Title | Thermo-Hygrograph |
| Manufacturer | R. Fuess |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | 9578 |
| Dimensions | 27.5 x 35.5 x 23 cm; 10 7/8'' x 14'' x 9'' |
| Material | Metal; Glass |
| Id Number | 296 |
| Object Title | Hair Hygrometer |
| Manufacturer | Negretti & Zambra |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | Unknown |
| Dimensions | 27 x 40 x 13.5 cm; 10 3/4'' x 15 3/4'' x 5 3/8'' |
| Material | Metal |
| Id Number | 297 |
| Object Title | Thermo-Hygrograph |
| Manufacturer | Negretti & Zambra |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | 35276 |
| Dimensions | 26 x 43 x 14 cm; 10 1/4'' x 17'' x 5 1/2'' |
| Material | Metal; Glass |