How to Check Compression

As a former chemist, I know there are two types of graduated cylinders - TD ("to contain"), and TD ("to deliver"). This is based on water at 60 F and is due to the surface tension of water (solvents have a negative meniscus and water has a positive meniscus). Since we're measuring water, and we're delivering to the cylinder, find the TD grad. cylinder. And if you have access to a burette, it'll eliminate the funnel and provide real control for adding the water. Borrow one - they're spendy.