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2. String galvanometer - Wikipedia

   en.wikipedia.org/wiki/String_galvanometer

   [4] Einthoven developed a sensitive form of string galvanomter that allowed photographic recording of the impulses associated with the heartbeat. He was a leader in applying the string galvanometer to physiology and medicine, leading to today's electrocardiography. [5] Einthoven was awarded the 1924 Nobel prize in Physiology or Medicine for his ...

3. 6 Christmas Collectibles That Could Be Worth a Fortune

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   Retired LEGO Christmas sets sell for hundreds of dollars on sites like eBay and StockX. Coca-Cola Christmas Collectibles Vintage Coca-Cola Christmas items, such as ornaments and other decor items ...

4. Tree-topper - Wikipedia

   en.wikipedia.org/wiki/Tree-topper

   A Christmas tree crowned with a star tree-topper in Little Stanney, Cheshire, in England, UK. A tree-topper or treetopper is a decorative ornament placed on the top (or "crown") of a Christmas tree. Tree-toppers come in many forms, though the most common include a star (representing the Star of Bethlehem), angel ("Christmas angel"), or fairy.

5. 12 Vintage Christmas Blow Molds Worth Serious Cash

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   Read more The post 12 Vintage Christmas Blow Molds Worth Serious Cash appeared first on Wealth G These iconic decorations first came about during the 1940s and have transformed over the decades.

6. Willem Einthoven - Wikipedia

   en.wikipedia.org/wiki/Willem_Einthoven

   Willem Einthoven (21 May 1860 – 29 September 1927) was a Dutch medical doctor and physiologist. He invented the first practical electrocardiograph (ECG or EKG) in 1895 and received the Nobel Prize in Physiology or Medicine in 1924 for it ("for the discovery of the mechanism of the electrocardiogram").

7. Horatio Burt Williams - Wikipedia

   en.wikipedia.org/wiki/Horatio_Burt_Williams

   Williams traveled to Holland to study the methods of Willem Einthoven in 1911. [ 2 ] He constructed the first string galvanometer in America, pioneered vectorcardiography , discovered the ventricular vulnerable period, and first determined the 60-Hz current required to produce ventricular fibrillation with body-surface electrodes.