Burning glass (English Wikipedia)

Joseph Priestley, Experiments and Observations on Different Kinds of Air Vol.2 (1776)
Bates, William H. (1920). "Chapter 17: Vision Under Adverse Conditions a Benefit to the Eye". Perfect Sight Without Glasses. New York: Central Fixation Publish Co. pp. 183–197. ISBN 88-900756-3-5.
George A. Macbeth (1914). "Light House Lenses". Proceedings of the Engineers' Society of Western Pennsylvania. 30: 245.
H. P. Garg, J. Prakash (2000). Solar Energy: Fundamentals and Applications. Tata McGraw-Hill Education. p. 305. ISBN 9780074636312.

doi.org

Plantzos, Dimitris (1997). "Crystals and Lenses in the Graeco-Roman World". American Journal of Archaeology. 101 (3): 451–464. doi:10.2307/507106. JSTOR 507106. S2CID 193082510.

Metcalfe, Nick (2010-12-23), Deep Space Observer, Engineering Connections, retrieved 2022-12-07

Plantzos, Dimitris (1997). "Crystals and Lenses in the Graeco-Roman World". American Journal of Archaeology. 101 (3): 451–464. doi:10.2307/507106. JSTOR 507106. S2CID 193082510.

"Olympic Torch Relay history". London 2012 Olympic Games. Archived from the original on 19 July 2012. Retrieved 27 November 2012.

Aristophanes. "The Clouds". The Internet Classics Archive. Daniel C. Stevenson, Web Atomics. Retrieved 21 February 2018.

Needham, Joseph. Science and Civilization in China, vol. IV, part 1: Physics and Physical Technology (PDF). p. 98. Archived from the original (PDF) on 3 July 2017. Retrieved 5 September 2016.
Needham, Joseph. Science and Civilization in China, vol. IV, part 1: Physics and Physical Technology (PDF). pp. 97–99. Archived from the original (PDF) on 3 July 2017. Retrieved 5 September 2016.
Needham, Joseph. Science and Civilization in China, vol. IV, part 1: Physics and Physical Technology (PDF). p. 99. Archived from the original (PDF) on 3 July 2017. Retrieved 5 September 2016.

"The King and Queen Mother offer fire to His Majesty the King". Radio Free Asia. Archived from the original on 2021-04-26. Retrieved 2021-04-26.

de Villiers, Henri (2021-03-30). "La réforme de la Semaine Sainte de 1955 – 7ème partie – La Vigile pascale". Schola Sainte-Cécile Official website (in French). Retrieved 2021-04-26.

Plantzos, Dimitris (1997). "Crystals and Lenses in the Graeco-Roman World". American Journal of Archaeology. 101 (3): 451–464. doi:10.2307/507106. JSTOR 507106. S2CID 193082510.

skullsinthestars (2010-02-07). "Mythbusters were scooped — by 130 years! (Archimedes death ray)". Skulls in the Stars. Retrieved 2022-12-07.

Needham, Joseph. Science and Civilization in China, vol. IV, part 1: Physics and Physical Technology (PDF). p. 98. Archived from the original (PDF) on 3 July 2017. Retrieved 5 September 2016.
Needham, Joseph. Science and Civilization in China, vol. IV, part 1: Physics and Physical Technology (PDF). pp. 97–99. Archived from the original (PDF) on 3 July 2017. Retrieved 5 September 2016.
Needham, Joseph. Science and Civilization in China, vol. IV, part 1: Physics and Physical Technology (PDF). p. 99. Archived from the original (PDF) on 3 July 2017. Retrieved 5 September 2016.
"The King and Queen Mother offer fire to His Majesty the King". Radio Free Asia. Archived from the original on 2021-04-26. Retrieved 2021-04-26.
"Olympic Torch Relay history". London 2012 Olympic Games. Archived from the original on 19 July 2012. Retrieved 27 November 2012.
"2.009 Product Engineering Processes: Archimedes". Archived from the original on 2017-12-12. Retrieved 2009-12-05.