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13. Sur les relations qui existent entre les 



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2O. Memoire sur la representation des 



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8. Note on the effect produced on 

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9. A catoptric immersion illuminator. 



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10. The vertical illuminator and homo- 



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11. On a table of numerical-apertures, 

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12. On the visibility of minute objects 

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 Stern, David, & Clarke, Frank Wigglesworth. 



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