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by Science Source
$3.50
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Product Details
Accessorize your life with unique stickers from an independent artist! Our vinyl stickers are available in four different sizes and are kiss-cut to create a 1/8" border around the perimeter of the design. Each sticker has an adhesive backing with plenty of stickiness to cling to any smooth surface while still being easy to remove.
Design Details
Einthoven standing beside his original string galvanometer in laboratory. Willem Einthoven (1860-1927) was a Dutch doctor and physiologist. He... more
Care Instructions
Stickers should be applied to clean, smooth surfaces at room temperature.
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2 - 3 business days
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Sticker
Einthoven standing beside his original string galvanometer in laboratory. Willem Einthoven (1860-1927) was a Dutch doctor and physiologist. He invented the first practical electrocardiogram (ECG or EKG) in 1903 and received the Nobel Prize in Medicine in 1924 for it. In 1901, Einthoven completed a series of prototypes of a string galvanometer. This device used a very thin filament of conductive wire passing between very strong electromagnets. When a current passed through the filament, the electromagnetic field would cause the string to move. A light shining on the string would cast a shadow on a moving roll of photographic paper, forming a continuous curve showing the movement of the string. His assignment of the letters P, Q, R, S and T to the various deflections is still used. The term "Einthoven's triangle" is named for him. It refers to the imaginary inverted equilateral triangle centered on the chest and the points being the standard leads on the arms and leg. After his developme...
$3.50
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