Yesterday I donated my 16th pint of O positive blood and picked up my 2 gallon pin.

Later in the day I went to a Kalamazoo Section American Chemical Society meeting. There was a "recycled" poster section, one of which was about extracting natural orange color from avocado seeds using methanol. Later there was a talk about the science of brewing beer. The meeting was at Bell's Brewery in Kalamazoo.

Altogether a productive day.