1. Together with the optical instrument manufacturer Zeiss, he developed the slit ultramicroscope. 2. Its product range by this point included several optical instruments besides microscopes. 3. Zenbei researched some imported optical instruments , then in 1793, made his first telescope. 4. It gives a technical and cultural-historical survey of the development of optical instruments . 5. He filled the observatory with a collection of maps, globes and optical instruments . 6. Thomas Cooke, the machinist and optical instrument maker, was born here. 7. His Brashear Company factory manufactured optical instruments for science and industry. 8. It was also popular choice for use in optical instruments , especially in Germany. 9. In the second main sections, the results obtained are applied to optical instruments . 10. He decided that for such detailed work, they may have had optical instruments .
