the optical oil forms an interface between the slide and the objective,
reducing extraneous light and sharpening image

          pond water

   when viewing a living specimen, keep your light low...
light = heat
and a strong light will  will fry the little guy ;(

             total magnification =
ocular magnification
​X
​objective magnification

   always start to focus using the lowest magnification

     --->

    preparing a 
wet mount slide

              plant cells

             The Microscope

   as magnification increases, the area of the field of view decreases

  very cool electron scope images

            as magnification increases, your light intensity decreases so you should open your iris to add light

cocci               bacilli             spririla

         your cheek cells

bacterial cell shapes and orientations

diplo = two

strepto = chain

staphlo = cluster

using oil immersion lens
at 1000X total magnification