M. Leonel Reynard informs us that we are likewise wrong in attributing to Argand the idea of a lamp with a double current of air. It is to Teulère that it should, in the main, be attributed. However, this engineer, who has asserted the priority of his claim to the invention of the reflectors, and the system of eclipses, has not insisted upon that of the lamp. He limits himself to saying that Argand entertained the same idea as himself, and derived great profit from it.
[19] Stevenson, “On Lighthouses,” pp. 92, 93.
[20] Stevenson, “On Lighthouses,” pp. 105–107.
[21] From the Greek [δίοπτρον], an optical instrument with tube for looking through. [Δίοπτρον] is from [διἁ], through; and [ὅπτομαι], I see.
[22] ] From [ὅλος], entire; and [φὼς] light.
[23] These figures are the results of experiments made with an instrument invented by Mr. Thomas Stevenson, and called the Marine Dynamometer.
[24] Alan Stevenson, “On Lighthouses,” Weale’s Series, pp. 169, 170.
[25] “Smeaton and Lighthouses” (ed. 1844), pp. 24, 25; Smiles, “Lives of the Engineers,” ii. 17.
[26] It is obvious that this could never have happened had the modern regulation been in force which forbids the lantern, after the light is once exhibited, being left without the presence of a keeper.
[27] This is Smeaton’s own statement, but the reader is referred, for Mr. Alan Stevenson’s view of it, to p. 98.