1907: exhibits by J. H. Pledge
Find out more about this exhibition
List of all exhibits from the catalogue for this exhibition:
| Exhibit no. | Exhibitor | Exhibit title | Section | Picture | Catalogue |
|---|---|---|---|---|---|
| 478 | J. H. Pledge (E. F. Witthams) |
Model showing in graphic form the progressive absorptions, measured on the Hüfner spectrophotometer, of solution of potassium permanganate of strengths 1/250 to 1/50000. Front scale, wave lengths in A.U. Scale at side gives strengths of solutions | Scientific and Technical Photography and its Application to Processes of Reproduction | catalogue page |
