| http://www.w3.org/ns/prov#value | - This lead on to more medical instruments being developed such as; sphygmograph, which is an instrument to measure a person blood pressure and is a vital piece of equipment as it can test how well the heart is working and how well the blood is flowing through the body, the ophthalmoscope, which helps to look and examine a person???s eye and electrotherapy which must be said was ineffective but diff
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