![Philips on Twitter: "Balthasar van der Pol's research on FM radio was initially not met with much enthusiasm #TBT http://t.co/N3Z783ftIn" / Twitter Philips on Twitter: "Balthasar van der Pol's research on FM radio was initially not met with much enthusiasm #TBT http://t.co/N3Z783ftIn" / Twitter](https://pbs.twimg.com/media/CAb58QXWMAA9Lqb.jpg:large)
Philips on Twitter: "Balthasar van der Pol's research on FM radio was initially not met with much enthusiasm #TBT http://t.co/N3Z783ftIn" / Twitter
![On relaxation-oscillations in The London, Edinburgh, and Dublin Philosophical Magazine 2 pp. 978-992, 1926 | Balthasar van der Pol | 1st Edition On relaxation-oscillations in The London, Edinburgh, and Dublin Philosophical Magazine 2 pp. 978-992, 1926 | Balthasar van der Pol | 1st Edition](https://www.atticusrarebooks.com/pictures/1126_1.jpg?v=1542490513)
On relaxation-oscillations in The London, Edinburgh, and Dublin Philosophical Magazine 2 pp. 978-992, 1926 | Balthasar van der Pol | 1st Edition
![From left to right: Prof. Dr. Gilles Holst (1886-1968), Jhr. mr. P. Teding van Berkhout (1865-1935), Prof. Dr. Balthasar van der Pol (1889-1959). 11 December 1925. The honouring of Professor Lorentz at From left to right: Prof. Dr. Gilles Holst (1886-1968), Jhr. mr. P. Teding van Berkhout (1865-1935), Prof. Dr. Balthasar van der Pol (1889-1959). 11 December 1925. The honouring of Professor Lorentz at](https://c8.alamy.com/comp/2APX59E/from-left-to-right-prof-dr-gilles-holst-1886-1968-jhr-mr-p-teding-van-berkhout-1865-1935-prof-dr-balthasar-van-der-pol-1889-1959-11-december-1925-the-honouring-of-professor-lorentz-at-his-golden-doctorate-his-phd-was-in-leiden-in-1875-on-the-thesis-on-the-theory-of-reflection-and-refraction-of-light-with-52-of-the-54-dinners-from-left-to-right-identification-completed-thanks-to-p-67-in-frits-berends-stories-around-a-photo-lorentzs-golden-doctorate-a-tribute-without-precedence-koninklijke-hollandsche-maatschappij-der-sciences-haarlem-za-whose-numbers-are-listed-2APX59E.jpg)