Rare set of handwritten scientific notes in pencil by inventor Philo Farnsworth, unsigned, no date, written on the reverse of seven sheets of Farnsworth Television & Radio Corporation letterhead, with footer caption, “Cable Address ‘Television.’” The notes are comprised of approximately 30 chemical compounds and their formulas with notes on solubility, such as Sodium bromate, Sodium uranyl acetate, Potassium silicontungstate, Benzil, Lead dithionate, Diacetyl phenolphthalein, and more. Includes one page of typed chemical formulas. In overall fine condition, with rusty paperclip impressions to one page, and a light central bend to each page. Accompanied by a signed letter of provenance from Farnsworth’s granddaughter: “There were not many handwritten pieces when we emptied the house with exception of his handwritten lab journals that are now in the University of Utah special collections. This item is from the estate of Mrs. Philo T. Farnsworth.” Farnsworth had excelled in chemistry and physics at Rigby High School, and famously conceived the electric television at age 14.
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