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Phosphoric Acid by the Molybdic Method..

Pickering, E C., New Planetary Nebulæ.....

Pike, J. W., Preservation of Fossil Insects and Plants on Mazon Creek.
Planetary Nebulæ.........

....

Planorbis, Transformations, at Steinheim.....

Plasmodium, Permanent Microscopic Preparations.

Pollination of Yucca, and on Pronuba and Prodoxus...

Pottery, Colors for Salt-glazed.

Powell, J. W., Address, Chairman Subsection Anthropology.
Titles of papers....

Prehistoric Altars of Whitesides Co., Illinois...

President of the Entomological Club, Address .

President's Address..

Primitive Democracy in the Alps, Theory of..

Pritchett, H. S., Red Spot on Jupiter..

Procter, J. R., Titles of papers.

Production and Reproduction of Sound by Light...

Putnam, F. W., Titles of papers....

J. D., Title of paper.....

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Hitherto unknown Life-habits of two Genera of Bee-flies, Bombyliidæ..

649

Pollination of Yucca and on Pronuba and Prodoxus..

617

Recent Practical Results of the Cotton Worm Inquiry by the U. S. Entomo-
logical Commission.....

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Smiley, C. W., Spanish Mackerel and its Artificial Propagation........

Smith, Erminnie A., Titles of papers....

Sound, Production and Reproduction of, by Light..

Spanish Mackerel and its Artificial Propagation...

Stearns, W. A, Title of paper........

Sternberg G. M, Microscopical Investigations of the Havana Yellow Fever Commission..

St Giles Staircase..

Stone, G. H., Kames or Eskers of Maine...

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Treatment of Seeds and its Value to Cotton Planting and Culture..
Sunlight on Glass.......

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Taylor, Thomas, Sulphuric-acid Treatment of Seeds, and its Value to Cotton Culture.....
Thomas, B. F., Title of paper......

878

277

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Ward, L. F., Titles of papers . . . . .

"St. Giles Staircase" in Marblehead..

Vibrations of a Liquid Film, Device for Projecting without a Lens..
Vice President Agassiz, Address....

Hall, Address...

Wadsworth, M. E., Age of the Copper-bearing Rocks of Lake Superior...

Waldo, Leonard, Title of paper......

Walworth, Ellen H., Field Work by Amateurs..

Warner, J D., Numerical Roots of Equation below Fourth Degree..

Titles of papers

Warren, S. E., Observations on Geometric Beauty..

Water Analysis

Waters, G. F, Title of paper ..........

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Wiley, H. W., Effect of Heating with Acids, and Treating with Animal Charcoal on Rota-
tory Power of Glucose

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G. F., Attempt to Estimate Approximately the Date of Close of the Glacial Epoch
in New England....

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