Un metodo semplice per regolare lo spessore dello strato pollinifero nei vetrini di polline-campione (su polline acetolizzato)

In mounting up preparations of pollen and spore slide collection using glycerol jelly as embedding medium, one factor which has an important effect on the behaviour of pollen grains and spores in the distance between slide and cover glass. It is well know among palynologists that in slides that are too thin, pollen grains and spores are markedly crushed, flattened, and folded. This paper deals with one simple and cheap method for controlling the slide thickness: it consists of introducing into the pollen preparation one or more small paper crowns. This method prevents pollen and spores from crushing and allows more exact obervations and measurements