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422

INDEX.

Wiener, XI.

Williams, 267.

Wilson, 264.

Wilson's theorem, 264.

Winds, 384–386.

Winkler, 392.

Witch of Agnesi, 260.

Wittstein, XII.

Woepcke, 83, 103.

Wolf, C., 241; ref. to, 167.

Wolf, R., XI.

Wolstenholme, 341.

Woodhouse, 334.

Wren, 177; ref. to, 188, 198, 213, 287.

Wronski, 324.

Xenocrates, 29.

Xylander, 153.

Young, 392; ref. to, 386, 387.

Zag, 127.

Zahn, XII.

Zehfuss, 325.

Zeller, 365.

Zeno, 27.

Zenodorus, 51.

Zero (symbol for), 7, 88; origin of term, 129.

Zeuthen, 313; ref. to, IX., 297.

Zeuxippus, 40.

Zolotareff, 371; ref. to, 372.