Scientific/Engineering from The Personal Navigator

Santa Barbara, CA: Editors and Engineers Ltd, 1949. 14 x 21 cm. Booklet helps to prepare people for commercial radio operator's license examination. Questions on neutralization, inductance, reactance, resistance, phase difference, power factor, ""skin effect"", radiation resistance, capacitance, carrier wave envelopes, frequency shift, Hartley oscillator, Colpitts oscillator, grid bias voltage, radio frequency chokes, more. Includes diagrams of circuits,… Read more about this item

Bradford, Great Britain: World Power Conference, Fuel Conference, 1928. 15 x 24 cm. Report for World Fuel Conference explores alternative fuels to anthracite, because they may be less costly and more readily available. F.G. Tryon writes about Processed Coals --Briquettes; Low-temperature Carbonisation, Gas Coke, Domestic By-Product Coke. Tables show cost of coal per ton of coke, changes in… Read more about this item

New York, NY: D.K. Minor and J.E. Challis, 1834. 16 x 24.5 cm. Front page shows drawing for steam heating a factory. Mr. Snodgrass of Glasgow, Scotland, the inventor, notes that the American atmosphere sometimes is highly electrical and destitute of hydrogen. Lessons about Tin and Lead, Nickel, Cadmium and Zinc. Animal Mechanics: Look at the feet… Read more about this item

New York, NY: D.K. Minor and J.E. Challis, 1834. 16 x 24.5 cm. Front page shows View of a Cotton Scutching and Lapping Engine invented by N. Snodgrass. Information on obtaining patents in England. Drawing and description of Beecher's Portable Horse Power, for thrashing, drinding, turning and sawing. Newly Invented Railways. Railroad from Tuscumbia to Tuskaloosa, Ala.… Read more about this item

Washington, DC: United States House of Representatives, 1877. 15 x 23 cm. Letter from President U.S. Grant of Jan. 12, 1877 transmits letter from Secretary of War J.D. Cameron of Jan. 11, 1877 with the whole package of indorsements and statements for the Chief of Engineers for the improvement of the Mississippi, Missouri, and Arkansas Rivers; the Ohio River;… Read more about this item