Originally Posted by ganymede
Is clay accurate?...dropped into a marked beaker of course.
Sure, you could measure the volume by displacing the water in a beaker if it's accurately graduated. The trick is to get the clay level w/the surface of the deck- even a small amount over or under will skew the results.
Any reason you don't want to use the more traditional method of colored water/isopropyl alky mix, a piece of clear plexiglass or a CD w/the plating scraped off, a dab of vaselene, and a 10cc syringe from the vet or pharmacy?