10. John Christopher Adelung's very interesting history of sea voyages for the discovery of a "northeast passage," which was published in quarto form under the following title: "Geschichte der Schiffahrten und Versuche welche zur Entdeckung des Nordöstlichen Weges nach Japan und China von verschiedenen Nationen unternommen worden. Zum Behufe der Erdbeschreibung und Naturgeschichte dieser Gegenden entworfen von Johann Christoph Adelung, Herzoglich Sachsichen Rath Halle bey Johann Justinus Gebauer, 1768." 11. Notice des Ouvrages de M. d'Anville. 8°, Paris, An. X [1802], 120 pp. By Barbic du Bocage. In addition to these and other works from my own collection, I have consulted at the library of the United States Naval Observatory, in this city, "Histoire de l'Academie Royale des Sciences, Année 1750," Paris, 1754, and the same, "Année 1754," Paris, 1757, which contain articles on de l'Isle's manuscript maps of 1731 and 1752, the latter being substantially identical with the published map of 1752. * * * * * From Dall's review we learn that Lauridsen is responsible for the statement that the discoveries of Bering in his first voyage were shown on a chart made at Moscow in 1731, but no authority is given as to the cartographer. Later I shall adduce evidence to confirm Dall's opinion that the Moscow map was merely a copy, such as were distributed to personages of importance or to those connected with the expedition. It is further susceptible of, as I think, tolerably satisfactory proof that the outlines of Kamshatka, with fairly correct meridians of longitude, were made public in a chart by de l'Isle not in 1731, but the year following, 1732, and it is likely that the lost map of that year was substantially reproduced in the chart of 1752, which I have the pleasure of now presenting for your examination. De l'Isle presented this map to the Academy of Sciences of Paris on April 8, 1750. The circumstances connected with the {212} presentation have been drawn from the official records of the Royal Academy of Sciences, and are as follows:[2] Cette année (1750) M. de l'Isle lut à l'assemblee publique de l'Acadèmie, un Mémoire sur les Nouvelles Découvertes au nord de la mer du Sud; et presenta en meme temps une Carte que M. Buache avoit dressée sur ses Mémoires, et qui representoit ces Découvertes avec toute la partie du Globe terrestre, à laquelle elles appartiennent. Ces Ouvrages, alors manuscrit, furent depuis publiés en 1752, M. Buache presenta dans cette meme année la première partie de ses Considérations géographiques sur le meme sujet, avec les Cartes qui y étoient relatives.[3]