With the advent of the microscope, one was able to observe micro-crystals that were shaped like the unit cell geometry.
(one; was; able to observe micro-crystals) (one; to observe; micro-crystals that were shaped like the unit cell geometry) (micro-crystals; were shaped; )
one one micro-crystals
was to observe were shaped
able to observe micro-crystals
micro-crystals that were shaped like the unit cell geometry