8018 60by Watson.jpg (60749 bytes)


Fine Diatom Microscope Slide Group by Watson

A very fine slide by Watson, it is marked on oval labels in hand-written script, "Group of Diatomaceae, 60 forms, England", and bears the Watson circular label. The entire grouping is shown in the photo with bright field illumination. A close-up, color-enhanced photo is behind. The slide contains 60 different diatoms, meticulously laid out in a circular pattern. Diatom slides were quite popular in England toward the end of the 19th century, and were often used to test the resolving power of the optics. Some manufactures made test slides using the diatom Pleurosigma angulatum. Slide groups, like the one featured here, were done to show the variety of forms available in a particular locale.

Item 8018

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