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1888-156|1888-156/38/6|10644802

 

Glossary:

Glossary: pulse

The throbbing of the arteries as blood flows through them. The pulse matches the rate at which the heart is beating.

Glossary: sand-glass

Device to measure equal periods of time by the motion of sand or other free-flowing, fine-grained substances through a narrow aperture between two triangular or conical glass bulbs arranged mouth to mouth; probably introduced in the early 14th century and used then especially for timekeeping on board ships. Hour-glass or minute-glass are specific examples.