The majority of the models illustrate microscopic disease-causing fungi, modelled at a magnification of between 20-600 times. They include common moulds found on bread and vegetables, fruit rots and diseases of potatoes, wheat and brassicas. Generally, this type of model was made using clear, uncoloured glass, as the fungi are transparent or hyaline in nature. Coloured glass was used where necessary, such as for dark spores. These models are often extremely fragile objects.
The other group of models include larger fungi and vegetables that are being attacked by fungal growths, all of which are modelled at approximately natural size. Dillon Weston made these models from opaque, coloured glass, and they are much sturdier than the transparent type.
Only one other collection of glass fungi models is known - part of the The Ware Collection of Blaschka Glass Models of Plants in the Harvard Museum of Natural History, Cambridge, Massachusetts.