Complex sentence: In 1665, Robert Hooke used a microscope about six inches long with two convex lenses inside and examined specimens under reflected light for the observations in his book Micrographia.swag with a single lens for examining specimens with direct transmitted light, because this allowed for a clearer image.
Split into simpler sentences: In 1665, Robert Hooke used a microscope about six inches long with two convex lenses inside and examined specimens under reflected light for the observations in his book Micrographia. Hooke also used a simpler microscope with a single lens for examining specimens with direct transmitted light, because this allowed for a clearer image.