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The Paris Opera House

A New Rack Saw Guard

New Rotary Steam Motor

Determining Lengths of Crank

The Spencer Automatic Screw Machine

Psychological Cause of Laughter

The Determination of Sex

Miscellaneous Notes

Selected Formulæ

Electrical Notes

Manufacture of Albumen at Chinkiang

Monument in Commemoration of the Battle of Leipsic in 1813

The German Maneuver Fleet in a Storm on the Baltic

Official Report on the Naval Operations in the West Indies

The Germination of the Truffle


The Dignity of Analytical Work



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