Each apochromatic lens and Newtonian parabolic mirror is similarly hand-rubbed with sub-diameter pitch tools, the optician removing millionths of an inch to turn what would have been a good optical surface into one of the finest obtainable.
(Each apochromatic lens and Newtonian parabolic mirror; is; similarly hand-rubbed with sub-diameter pitch tools) (the optician; removing; millionths of an inch)
Each apochromatic lens and Newtonian parabolic mirror the optician
is removing
similarly hand-rubbed with sub-diameter pitch tools
millionths of an inch