This parasitic worm, here encysted in
guinea-pig striated muscle,
is stained with haematoxylin and eosin and imaged with a single lens (=simple) microscope.
Xylem and phloem are well resolved by a single
lens. This standard section
is here viewed through a single lens of Victorian manufacture.
Stained with safranin / light green, this
section of a strobilus of Lycopodium is imaged
through a spinel lens ground by the late Horace Dall of Luton.
A sporing body on a sectioned wheat stalk,
unstained and mounted
in immersion oil, is clearly imaged by the single spinel lens.