Old Master  (or  old master ) is a painter of skill who worked in Europe before about 1800, or a painting by such an artist. An  old master print  is an original print (for example an engraving or etching) made by an artist in the same period. Likewise an old master drawing .
Quick Answer. Dendrology is the study of trees and other woody plants, such as shrubs and woody vines. Dendrologists study every aspect of wooded plants to determine various characteristics of their structural systems. Continue Reading.
The appearance of a tree's rings reveals its various periods of growth. There are a few ways that scientists examine a tree's rings. Many scientists study a tree's rings after a tree has fallen. A tree's rings can also be looked at by taking a sample from a living tree. First, a very thin portion is drilled out with a boring tool. The scientist then tends to the hole leaving the tree to continue its growth. As a consequence, a scientist can get a quick look at the history of a tree. Tree rings help us to learn about some of the oldest trees in our environment. By examining the types of tree rings as well as their patterns, a scientist can reconstruct the history of a tree. Tree rings reveal the significant events in a tree's life.