the microscope

cocci               bacilli             spririla

         your cheek cells

bacterial cell shapes and orientations

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

  very cool electron scope images

using oil immersion lens
at 1000X total magnification

             total magnification =
ocular magnification
​X
​objective magnification

    preparing a 
wet mount slide

              plant cells

     --->

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

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

          pond water

diplo = two

strepto = chain

staphlo = cluster

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

   always start to focus using the lowest magnification