A dry mount requires no water usually
used for inanimate objects. Depending on what you are mounting will depend on
how long they last. There are many ways to make dry mounts. Cutting
specimens with a razor makes the edges clean and straight so it is easy to
focus and attach. However, using a razor can be dangerous so using something
like cork can make cutting a specimen easier. Once the object is cut you can
use white glue or other mediums to glue the object to a stiff cardboard or
glass slide. In lab we will make a dry mount of two aquatic plants so you can
compare and contrast the difference.
A wet mount requires water and is used to prepare temporary slides to observe living organisms. Larger organisms are usually immobilized by the coverslip but the very small may be able to move for a while. The organisms will be alive for a short period of time, but they are usually stressed so information derived may not reflect their normal life cycle. You usually put a drop of water that you suspect has little critters on a glass slide. Larger organisms may not fit under a coverslip and you may “squish” the critter. You may need a few drops of water depending on how large you coverslip is. Put a coverslip over the drops by gently placing it at an angle to remove any air bubbles. The coverslip makes the height of the slide is uniform, so it helps in viewing under a transmitted light microscope.