on christmas eve, lying beneath the tree, do you wonder what your parents are doing? i think that this is a very individual and personal decision to make. i read this book two years ago when i wanted to switch career paths, and it helped me a lot. analytical laboratory: a laboratory (lab) provides controlled conditions in which scientific research, experiments, and measurement may be performed. depending on which part of the material you are looking at, you can also sometimes also see the darker area that is the piston. some may be unused things which were given to them as gifts. 