Spirometer progress

One of the doctors told Carl that improvement on the spirometer was his "ticket to leave", so he definitely worked on it!

Here is a video of him using it: https://youtu.be/hrRRegsM_8k 

Note that he is breathing *in* (sucking in) to do the measurement. One thing he learned was to blow all air out before starting so he had more lung capacity to breathe in.

Up to 1750!

Carl kept on asking, "Where do I turn this in so I can get my ticket to leave?!?!?"