| 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 |
| Id Number | 300 |
| Object Title | Advertising Thermometer; Hygrometer |
| Manufacturer | Unknown |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | Unknown |
| Dimensions | 15 x 3 cm; 6'' x 1 1/4'' |
| Material | Metal; Glass |
| Id Number | 309 |
| Object Title | Hair Hygrometer |
| Manufacturer | Ingraham |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | Unknown |
| Dimensions | 13 x 3 cm; 5'' x 1 1/4'' |
| Material | Wood; Metal; Glass |