Many of the necessary tools, you probably already have in your tool chest. You may be working on a new roof, but it is more likely that you will be shingling a roof that already has a layer or two of shingles. If there is more than one layer you will need to remove the old shingles.
Electroencephalography definition, an instrument for measuring and recording the electric activity of the brain. See more.
âElectrical silence,â or no evidence of brain activity, when demonstrated once and then again in 24 hours, has been taken as one of the criteria of death. Electroencephalography is widely used in studying brain function and in tracing the connections between the parts of the central nervous system.