Books: Charlemagne's Canal

SAILING ACROSS EUROPE—Negley Farson—Century ($3.50). Everyone knows that Europe's air system now reaches every important city and many an unimportant. But who knew that for centuries it has been possible to travel inland by boat from Rotterdam, climb the Rhine, get into the Danube and debouch upon the Black Sea? The key link is the Ludwig Canal, begun by Charlemagne 1,200 years ago. With 101 locks in 107 miles it climbs out of Bavaria through the clouds of the Frankischer Jura mountains and deposits you in Austria. . The German Consulate at...