Freezing microtomes, don't like the term Co2 as they work equally well 
with a Peltier stage, are a joy. Whenever I have to use one my wee face 
lights up with delight. They sort out the real Histologists form the 
cardboard Histologists. They bring out your skills in manual dexterity with 
free floating sections and the art of staining is given a new dimension. 
Let's hope they never become a museum item as they are still a valuable 
tool in the Histologists repertoire.
Ian.