Microscopy

A whole           in a drop.

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Top right : Edge of cultivated lawn grass.

 

Bottom left : Edge of wild broad leafed grass.

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One of the reasons that grass is so unpalatable for humans is its tendency to accrue silica (the main constituent of glass) as part of its structure. It is particularly evident at the edges where it can form a formidable array of teeth resembling a saw blade. Looking closely at the sample of wild grass it is to see how you can get a nasty cut if you brush against it. The are many different varieties of grass so potentially a lot of variations to look at, a magnification of around 100x is quite adequate to see teeth at the edge.

 

 

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Grass and glass

Garden Exploration