The following links are informative and interesting
• Molecular Expressions: Exploring the World of Optics and Microscopy
Going where no microscope has gone before Molecular Expressions offers one of the Web's largest collections of color photographs taken through an optical microscope (commonly referred to as "photo-micro-graphs")
• Microscopy Society of America
The Microscopy Society of America (MSA) is a non-profit organization dedicated to the promotion and advancement of the knowledge of the science and practice of all microscopical imaging, analysis and diffraction techniques
• Sell Your Antique Microscopes
Have an old antique microscope collecting dust? These folks buy antique brass microscopes and all kinds of microscope accessories including: lenses, parts, microscope oil lamps, prepared slides, slide preparation equipment, and slide cabinets. View microscopes that date from the 18th century!
