A late 1940s advertisement for new RCA Victrola.

A cartoon depicting a victorious William Preece, touting experience over experiments, standing over Oliver Lodge, 1884. The two engaged in a heated public debate over the nature of lightning conductors and lightning discharges. Preece was a Post Office engineer who had no formal training in electricity or magnetism, whereas Lodge was a physicist who was a proponent of Heaviside’s emerging theoretical work on self-inductance - much of the debate was centered around practice versus theory. While the cartoon depicts otherwise, Lodge’s theoretical approach eventually won out over Preece’s practical approach and profoundly affected the development of electromagnetic theory.

Telegraph cables, 1865

RAF Signals Vehicle, Type 456 carrying a 20 KVA Generator, used for powering English radar units during World War II.

Crossley Stand-by Plant, West Coast CH Station. The station generator powered English radar systems during World War II.

Control desk for NBC television studio in Radio City, 1939. The operators observe the picture on the kinescope monitors located just above eye-level and also look into the studio via the window below.

An IBM 5100 chip sharing the eye of a needle with a piece of string. The 5100 was introduced in 1975 and came with 64KB RAM and a 1.9 MHZ processor. It retailed for $19,975 and weighed 55 pounds.


From week ending January the 10th, 1881.
Engineering’s fortnightly patent record.

(Reblogged from old-engineering)

Tube parallel wired amplifier, circa 1940s.

Michael Faraday’s interaction with the Thames, as depicted in response to his letter “Observations on the Filth of the Thames”, Punch, 1855. Faraday was a pioneer in many areas of electromagnetism and chemistry, and was deeply concerned about the polluted state of the Thames. He wrote of the river: “The appearance and the smell of the water forced themselves at once on my attention. The whole of the river was an opaque pale brown fluid. In order to test the degree of opacity, I tore up some white cards into pieces, moistened them so as to make them sink easily below the surface, and then dropped some of these pieces into the water at every pier the boat came to; before they had sunk an inch below the surface they were indistinguishable, though the sun shone brightly at the time; and when the pieces fell edgeways the lower part was hidden from sight before the upper part was under water.”