Investigate · Paris 1889

Aerial view of Eiffel Tower and Exposition Universelle, Paris, 1889

1 clue in this photo

1Scale

The Galerie des Machines at true scale

The aerial view shows the Galerie des Machines and the domed palaces as huge blocks across the Champ de Mars, with a balloon in the sky. The record gives the Galerie a span of about 115 m.

The questionHow was a span that size raised for a single season?

Photo: Photographer : Alphonse Liébert (1827–1913) · Public domain · via Library of Congress via Wikimedia Commons

Paris 1889 Case file

Same kind of clue, elsewhere

#10Scale · St. Louis 1904Twelve men and a tripod to plant one treeIf one tree took this much effort, what did the palaces take?

Scale · London 1851Carriages for scale along the north-east frontAt that scale, what did the hauling and erection really require from a horse-powered city?

Scale · Philadelphia 1876Crowds give the scaleHow many stone-setters and teams would a hall like this need on the timeline recorded?

Scale · Chicago 1893The Court of Honor with crowdsAt this scale, what were the crew and horse counts needed for about 200 buildings in about two years?

Scale · Atlanta 1895A horse and wagon unloading cratesHow many wagon trips would it take to supply a whole fair this way?

Scale · Atlanta 1895Inside the Fine Arts BuildingWhy was a finished gallery like this not kept by a growing city?

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