15 slides

1 - Pollen grains of different kinds of grass
2 - Pollen grains of different deciduous trees
3 - Pollen grains of different conifers
4 - Mixed house dust
5 - Dust mite from a living room
6 - Spores of different fungi
7 - Wood powder
8 - Asbestos powder (cancerogenous)
9 - Talcum powder
10 - Crystals of washing-powder
11 - Polyamide fibres
12 - Nylon fibres
13 - Mucous membrane of human nose, t.s.
14 - Healthy human lung, t.s.
15 - Human lung injured with dust particles, t.s.