Leeuwenhoek type microscopes, late 17th century.

Leeuwenhoek's aquatic microscope, c 1722.

Leeuwenhoek's observations on bacteria, c 1683.

Simple microscopes, 17th century.

Leeuwenhoek microscope, c 1670.

Leeuwenhoek Microscope, c 1670.

Antoni van Leeuwenhoek, Dutch pioneer of microscopy, c 1660.

'New Universal' silver microscope by George Adams, 1761.

'New Universal' silver microscope by George Adams, 1761.

'New Universal' silver microscope by George Adams, 1761.

'New Universal' silver microscope by George Adams, 1761.

'New Universal' silver microscope by George Adams, 1761.