Replacing the Bulb
The plastic end comes off. Just squeeze it a bit and it will pop off. The bulb then screws out. It takes a minature bulb. a 2/AAA cell mini lamp. Says it is universal. The number on mine was MB-224. I think that the one in it was the 1.5. You should be able to find it at a local drug store, department store or hardware store. Sonlight does not carry replacement bulbs.
Can the Magnifier view slides? [11.05]
I got my magnifier out and my slides and it works great if you hold the slide up to a light then put the magnifier on the other side and look at it that way. So you are looking through the magnifier and have it resting on the slide while pointing the whole thing toward a light source (like the overhead light in a room). Since the slide is transparent, if you hold it down and look at it, you really can't see much becasue the colors behind the slide show up. I tried looking at a slide that was laying on a piece of typing paper and that didn't work either.
I guess it has to have a light source on the other side. I looked at a planaria and a spirogyra and it looked pretty cool and I could see the same structures you see when looking in a microscope. Pretty easy to use.