Since the mid-18th century, England had been the centre of the optics industry, due to the work of instrument-maker John Dolland (1706-1761). Dolland manufactured small ‘achromatic’ telescopes with high-quality lenses made of flint glass (instead of the inferior crown glass). His products were in high demand from astronomers all over Europe. This began to change, … Continue reading The Poor Man’s Son Who Usurped the British Market of Optical Lenses