. . . . . . . . . . . . . . . . "Kirchhoff's Laws" . "Kirchhoff" . . . . . . . . . . . "Kirchhoff's three laws" . "1887" . "G. R. Kirchhoff" . . . . . . "Gustav Robert Kirchhoff" . . . . . . . "Gustav Kirchhoff" . . . . "Gustav_Kirchhoff#Kirchhoff.27s_three_laws_of_spectroscopy" . "R. Kirchhoff" . "three laws of spectroscopy" . . . "Kirchhoff's laws of spectroscopy" . . . . . . . . . "G. Kirchhoff" . . . . . . . . . . . . . "Gustav Kirchhoff" . . . "Gustav Kirchhoff" . . . . "Kirchhoff's Law of Thermochemistry" . . . "1824-03-12" . . . . . . . . . . . . . . . . . "Kirchhoff's law" . . . . "1824" . . "Kirchhoff's law of thermochemistry" . . . . . . . . . . "Gustav Robert Kirchhoff" . . . . . . . "Kirchhoff, Gustav Robert" . . . . . "Kirchhoff\u2019s" . . . . . . . . . . . . . . . . . . . . "1887-10-17" . . . . . . . . . .