Assign. #1: Saving, editing and resaving a jpeg file- Don't do it

For this assignment I used this image of a steam engine that I thought would be fun to change into sepia and black and white. I altered the original image to black and white. Next I opened the black and white image and changed it to sepia. Then I opened the sepia image and changed it back to black and white. I did that back and forth 10 times all the while saving it as a jpeg file.

the original color file
this is the first sepia edit, test 2
this is the last sepia edit, test 10
It's kind of fun to see how it changes. Obviously it has lost a lot of the lighting, contrast and detail. Foggy is the one thing that I think as I look at the difference from the second photo. Test 10 almost looks like a picture out of a newspaper from the 1930's or something.

For those of you not in my class: If you are going to be editing photographs, don't save it as a jpeg because it compresses each time it is saved. Save it as a tiff which will allow you to make changes, save it and come back to make more changes later without compromising your photo. If it needs to be a jpeg file you can rename your photo when you are finished editing.