Historical articles by Lotka and Volterra

While writing a review, I found that some works by Lotka and Volterra were not easily accessible online, so I have collected them here.

Alfred James Lotka

• Contribution to the theory of periodic reactions
  The Journal of Physical Chemistry 14.3 (1910): 271-274
  PDF
• Zur theorie der periodischen reaktionen
  Zeitschrift für physikalische Chemie 72.1 (1910): 508-511
  PDF
• Contribution to the general kinetics of material transformations
  Proceedings of the American Academy of Arts and Sciences 55.3 (1920): 137-153
  PDF
• Evolution and irreversibility
  Science Progress in the Twentieth Century 14.55 (1920): 406-417.
  PDF
• Analytical note on certain rhythmic relations in organic systems
  Proceedings of the National Academy of Sciences 6.7 (1920): 410-415
  PDF

Vito Volterra

• Fluctuations in the abundance of a species considered mathematically
  Nature 118.2972 (1926): 558-560
  PDF
• Sulle fluttuazioni biologiche
  Rendiconti Accademia dei Lincei 6.5 (1927, reprint)
  PDF
• Variazioni e fluttuazioni del numero d'individui in specie animali conviventi
  Memorie del Reale Comitato talassografico italiano 131 (1927, reprint)
  PDF

Correspondence between Lotka and Volterra

After reading Volterra's 1926 article in Nature, Lotka recognized similarities between their equations and results. He wrote a letter to the editor, to which Volterra replied. The exchange is reported here. Volterra concedes the priority of Lotka's work but highlights some differences.

• Letter to the editor and reply
  Regarding "Fluctuations in the abundance of a species considered mathematically"
  Nature 119.2983 (1927): 12-13
  PDF