Claude-Auguste Lamy used a spectrometer that was similar to Crookes' to determine the composition of a selenium-containing substance which was deposited during the production of sulfuric acid from pyrite.
Claude-Auguste Lamy usou unha técnica semellante á de Crookes para determinar a composición dunha substancia que contiña selenio, depositada durante a produción de ácido sulfúrico a partir de pirita.