 Helmholtz now became the second formative, and decidedly primary, influence on Weber’s career.During his three years as Helmholtz’s assistant in Berlin (1871–1874), Weber helped Helmholtz set up and equip the Berlin laboratory and also helped him direct the student laboratories.In 1872 and 1874, Weber published two noteworthy papers in the "Annalen der Physik" on determining the specific heats of carbon, boron, and silicon at various temperatures (Weber 1872, 1874).