| Id Number | 319 |
| Object Title | Thermo-Hygrograph |
| Manufacturer | R. Fuess Berlin-Steglitz |
| Date of Object | Unknown |
| Model | 18 |
| Serial Number | E 602 |
| Dimensions | 30.5 x 33 x 13.5 cm; 12'' x 13'' x 5 1/4'' |
| Material | Metal; Plastic |
| Id Number | 320 |
| Object Title | Hair Hygrograph |
| Manufacturer | Negretti & Zambra |
| Date of Object | Unknown |
| Model | Unknown |
| Serial Number | 25371 |
| Dimensions | 26.5 x 33.5 x 12.5 cm; 10 1/2'' x 13 1/4'' x 5'' |
| Material | Metal; Plastic; Hair |
| Id Number | 324 |
| Object Title | Thermo-Hygrograph |
| Manufacturer | R. Fuess |
| Date of Object | Unknown |
| Model | 18 |
| Serial Number | C 5755 |
| Dimensions | 28 x 35.5 x 24 cm; 11'' x 14'' x 9 1/2'' |
| Material | Metal |