Anna Pavlovna waited for him to go on, but as he seemed quite decided to say no more she began to tell of how at Potsdam the impious Bonaparte had stolen the sword of Frederick the Great.
Entering the city at the Potsdam Gate, traversing a few hundred yards of the Leipziger-strasse, turning into Wilhelm-strasse, and following it to Unter den Linden, then beginning at the Brandenburg Gate and proceeding down Unter den Linden to its end, one passes, among other buildings, the following, many of them of great architectural merit - the admiralty, the ministry of commerce, the ministry of war, the ministry of public works, the palace of Prince Frederick Leopold, the palace of the imperial chancellor, the foreign office, the ministry of justice, the residences of the ministers of the interior and of public worship, the French and the Russian embassies, the arcade, the palace of the emperor William I., the university, the royal library, the opera, the armoury, the palace of the emperor Frederick III., the Schloss-briicke, the royal palace, the old and new museums and the national gallery.
Sello, Potsdam and Sanssouci (Breslau, 1888); Miigge, Fiihrer durch Potsdam and Umgebung (Potsdam, 1896); Kopisch, Die koniglichen Schlosser and Garten zu Potsdam (Berlin, 1854); avid Bethge, Die Hohenzollernanlagen Potsdams (Berlin, 1889).
At Karasjok and Kremsmunster the seasonal variation in a i seems comparatively small, but at Potsdam and the Bureau Central it is as large as at Kew.
A more durable and more beautiful stone for building is the reddish or reddish-brown Potsdam sandstone of which there are extensive formations on the N.W.
Vogel of Potsdam introduced the method of photographing stellar and terrestrial spectra on the same plate, and in this way obtained an immense advance in the ease and precision of observation.
The only element of uncertainty was caused by the retardation of the current, which between Potsdam and Teheran (3000 m.) took 0 8.20 to travel; but it is probable that the final value can be accepted as correct to within os 05.
West of Berlin the Havel widens into what are called the I3avel lakes, to which the environs of Potsdam owe their charms. In general the soil of the North German plain cannot be termed fertile, the cultivation nearly everywhere requiring severe and constant labor.
The large difference between the means obtained at Potsdam and Kremsmtinster, as compared to the comparative similarity between the results for Kew and Karasjok, suggests that the mean value of the potential gradient may be much more dependent on local conditions than on difference of latitude.
A kind of reconciliation occurred in March, and after some days of good-fellowship Voltaire at last obtained the long-sought leave of absence and left Potsdam on the 26th of the month (1753).