The French Scientific Surveying Expedition to Peru

U radu je opisano izvođenje mjerenja duljina dijela meridijanskog luka u Peruu, današnjem Ekvadoru. Ekipe su na terenu imale velike poteškoće s klimatskim uvjetima rada i svladavanjem teških terenskih konfiguracija terena. Međutim, ipak su uspjeli vrlo točno izmjeriti duljinu luka meridijana, koja odgovara rasponu geografskih širina od 3°07\u2701\u27\u27, te su zaključili da duljina luka jednog stupnja meridijana u Peruu iznosi 56 749 toisea (110 604 m). Tako je potvrđeno da Zemlja ima približno oblik rotacijskog elipsoida i da su teorijska predviđanja Newtona i Huygensa bila ispravna.The paper describes how the lengths of parts of the meridian arc were measured in Peru (modern-day Ecuador). The field teams encountered great difficulties, due to the climate conditions in which they had to work, and the configuration of the terrain. However, they succeeded in measuring extremely accurately the length of the meridian arc corresponding to the range of latitude 3°07\u2701\u27\u27, and were thus able to conclude that the length of one degree of the meridian arc in Peru was equivalent to 56 749 toises (110 604 m). They also established that the shape of the Earth took the approximate form of a rotational ellipsoid, thus confirming the theoretical postulations of Newton and Huygens