| Id Number | 229 |
| Object Title | Advertising Hygrometer |
| Manufacturer | Unknown |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | Unknown |
| Dimensions | 14.4 x 3.75 cm; 5 3/4'' x 1 1/2'' |
| Material | Wood; Glass; Metal; Paper |
| Id Number | 251 |
| Object Title | Sling Psychrometer |
| Manufacturer | Lutz File & Tool Co. |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | Unknown |
| Dimensions | 36 x 13.5 x 1.5 cm; 14 1/4'' x 5 1/4'' x 5/8'' |
| Material | Metal; Wood; Glass |
| 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 |