| Id Number | 263 |
| Object Title | Assman Psychrometer |
| Manufacturer | OTA |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | 657 and 628 |
| Dimensions | 23 x 5.5 cm; 9'' x 2 1/8'' |
| Material | Metal; Glass |
| Id Number | 275 |
| Object Title | Hygrograph |
| Manufacturer | Frederick Goertz Ltd. |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | 1399 |
| Dimensions | 35 x 16.5 x 14 cm; 13 3/4'' x 6 1/2'' x 5 1/2'' |
| Material | Metal; Glass; Hair |
| Id Number | 278 |
| Object Title | Thermo-Hygrograph |
| Manufacturer | R. Fuess |
| Date of Object | Unknown |
| Model | 18r |
| Serial Number | E 601 |
| Dimensions | 31 x 33 x 13.5 cm; 12 1/8'' x 13'' x 5 1/4'' |
| Material | Metal; Glass |