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==Biografia==
'''David Alter'''
Nel 1836 a Elderton, David Alter inventa il [[telegrafo]], un anno prima di [[Samuel Morse]]. Disse al riguardo: {{citazione|I may say that there is no connection at all between the telegraph of Morse and others and that of myself...Professor Morse most probably never heard of me or my Elderton telegraph<ref name="Wiley" />}}
David Alter studiò medicina alla ''Reformed Medical College'' di New York City e alla ''Cincinnati Medical School'' (1841-1842).
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{{citazione|In the great [[Pittsburgh]] Fire of 1845, he found a shard of melted glass that gave him the idea of the light spectrum. He went on to discover Spectral Analysis in 1853. He also invented and patented a method of manufacturing Bromine from salt wells in 1845, that was highly useful in the iron industry and was put on display in the World's fair<ref name="Rowley" />}}
==Invenzioni==
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