- FondsYapp - Papers and photographs of R. H. (Harry) Yapp
- Series3 - Photographic collections
- Subseries1 - Glass plate negatives
- FileG - General (unclassified)
- 9 more...
- ItemG10 - [Figure 776]
- ItemG11 - [Plate II]
- ItemG12 - [Figure 778]
- ItemG13 - [Diagram of early stages of bean growth]
- ItemG14 - [Diagram of early stages of plant growth]
- ItemG15 - [Diagram of plant root growth]
- ItemG16 - [Diagram of plant root growth]
- ItemG17 - [Diagram of plant leaves]
- ItemG18 - [Diagram of water plants]
- 87 more...