In these years he improved the quality of achromatic microscope objectives and developed the fine adjustment of microscopic eyepieces introducing a fine pitch screw.
(he; improved; the quality of achromatic microscope objectives; T:In these years) (he; developed; the fine adjustment of microscopic eyepieces; T:In these years) (microscopic eyepieces; introducing; a fine pitch screw)
he he microscopic eyepieces
improved developed introducing
the quality of achromatic microscope objectives T:In these years
the fine adjustment of microscopic eyepieces T:In these years
a fine pitch screw