By Julius Robert Mayer. Annalen der Chemie und Pharmacie 42(2), pp. 233–240; doi:10.1002/jlac.18420420212.
Original German paper Bemerkungen über die Kräfte der unbelebten Natur (1842). The publisher confirms volume 42; the English translation page incorrectly lists 43. English translation by G. C. Foster (1862), reproduced in Magie (1935). Final paragraphs compare compression work and heat capacities.