A sedimentation rate is performed by measuring the rate at which red blood cells (RBCs) settle in a test tube. The RBCs become sediment in the bottom of the test tube over time, leaving the blood serum visible above. The classic sedimentation rate is simply how far the top of the RBC layer has fallen (in millimeters) in one hour.
The scope of genealogy, however, goes well beyond family trees; extending into areas of law, technology, event planning and medicine. Hiring a genealogist can be costly, so you must conduct your own research before hiring someone to do research on your behalf.
New trees are used when you want to maintain the management benefits of a single forest but have a domain in a new DNS namespace. For example corp.example.com may be the forest root, but you could have ad.mdmarra.com in the same forest using a new tree.