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Kepler, J., 22, 29, 33, 38, 44, 46, 48–58, 60, 62, 66, 79,

83, 97, 110, 119, 161, 174

Kepler's laws.

Kirchoff, G. R.

Kirsch.

Knobel, E. B..

53
115

I I

15, 16

95

176

Lamont, J..

Ko-Show-King.
Lacaile, N. L..

Lagrange, J. L..
La Hire.

Lalande, J. J. L...

Langrenus.

76, 78, 82, 151

144

76, 80, 82, 83, 91, 176

124
136

Laplace, P. S. de

Lassel..

62, 73, 77, 78, 82, 83, 156, 185
91, 112, 149

[blocks in formation]
[blocks in formation]

157

Newton, I., 6, 24, 53, 62, 64, 74, 78, 81, 86, 98, 99, 110,

114, 119, 143, 161, 169

Nicetas.

20, 32

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124

Spots on the sun, 123; periodicity of

Stars, parallax, 161; proper motion, 169; double, 167;

binaries, 168, 171; new, 24, 45, 174; catalogues
of, 24, 45, 176; spectra of, 182.

[blocks in formation]

158

Tycho Brahe, 29, 32, 38, 40, 47, 48, 49, 54, 63, 94, 95,

119, 164, 174

Ulugh Begh..

Uranus, discovery of.

Velocity of light, 108, 163; of earth in orbit

Verbiest.

Vogel, H. C..

Von Asten.

Walmsley.

Walterus, B.

Weiss, E..

Wells.

Wesley.

Whewell.

Williams.

Wilson, A..

Winnecke.

Witte.

Wollaston.

Wolf, M..

Wolf, R.

Wren, C.

31

83
162

95

117, 164, 171, 173

155

82

31, 94

158

153

132

141

13

122, 127

153

108

114

151, 158, 167

125

64

Wyllie, A.

Yao.

[blocks in formation]

97

ΙΟ

131

ΙΟ

100, 103

117

143

Half-Hours with the Stars

A PLAIN AND EASY GUIDE to the KNOWLEDGE OF THE CONSTELLATIONS, showing, in 12 maps, the position for the United States of the Principal Star Groups, night after night, throughout the year, with an introduction and separate explanation of each map. True for every year. Maps and text especially prepared for American students. By RICHARD A. Proctor, F.R.A.S. 4°, boards

$2.00

This is an entirely new edition, with new plates, prepared expressly for American students, of a work which in its original London issue has attained exceptional popularity.

"No teacher who has the responsibility of instructing a class in astronomy can afford to be without it."-Chicago School Herald.

Easy Star Lessons

By RICHARD A. PROCTOR, F.R.A.S.

With 48 Star Maps and 35 other Illustrations

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89 $250

'Nothing so well calculated to give a rapid and thorough knowledge of the position of the stars in the firmament has ever before been designed or published."-Weekly Times.

An Easy Guide to the Constellations By JAMES GALL, author of "The People's Atlas of the Stars," etc. New and Enlarged Edition, with 30 Maps, 16mo, 75 cts. net 'Excellently arranged and copiously illustrated, it should prove a valuable handbook for all who want to become familiar with the stars."-The Independent.

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The Stars

By SIMON NEWCOMB, Retired Professor U. S. Navy

8°, Illustrated. No. 9 in the Science Series. (By mail, $2 20)

Net $200

"The work is a thoroughly scientific treatise on stars.

The

name of the author is a sufficient guarantee of scholarly and accurate work."-Scientific American.

G. P. Putnam's Sons

New York

London

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