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La Salute è in voi! ("Health/Salvation is in you!") was an early 1900s bomb-making handbook associated with the Galleanisti, followers of anarchist Luigi Galleani, particularly in the United States. The anonymously written, Italian-language handbook repackaged technical content from encyclopedias and applied chemistry books into plain directions for non-technical amateurs to build explosives. It wrapped this content in a political manifesto advocating for impoverished workers to overcome their despair and commit to individual, revolutionary acts. American police and historians used the handbook to profile anarchists and imply guilt by possession. It figured prominently in the prosecution of the Bresci Circle, a case that revolved around the anarchists' right to read. Successful political bombers of this era ultimately had career backgrounds in explosives and were not the self-taught amateurs the handbook sought to create. (Full article...)

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On this day

May 1: Beltane and Samhain in the Northern and Southern Hemispheres, respectively; Maharashtra Day in Maharashtra, India (1960); Loyalty Day in the United States

Empire State Building

305 – Diocletian and Maximian retired as co-rulers of the Roman Empire, being succeeded by Galerius and Constantius Chlorus.
1794 – War of the Pyrenees: France regained nearly all the land it lost to Spain the previous year with its victory in the Second Battle of Boulou.
1931 – New York City's Empire State Building (pictured), at the time the tallest building in the world, opened.
1974 – Argentine president Juan Perón expelled Montoneros from a demonstration in the Plaza de Mayo in Buenos Aires, forcing the group to become a clandestine organization.

Alexander William Williamson (b. 1824)
Anna Jarvis (b. 1864)
Eldridge Cleaver (d. 1998)

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The Rock Springs massacre occurred in 1885 in the present-day United States city of Rock Springs, Wyoming. The riot, and resulting massacre of immigrant Chinese miners by white immigrant miners, was the result of racial prejudice toward the Chinese miners, who were perceived to be taking jobs from the white miners. The Union Pacific Coal Department found it economically beneficial to give preference in hiring to Chinese miners, who were willing to work for lower wages than their white counterparts, angering the white miners. When the rioting ended, at least 28 Chinese miners were dead and 15 were injured. Rioters burned 78 Chinese homes, resulting in approximately $150,000 in property damage (equal to $5.09 million in 2020 terms). The massacre in Rock Springs touched off a wave of anti-Chinese violence, especially in the Puget Sound area of Washington Territory.

Artwork credit: Thure de Thulstrup; restored by Adam Cuerden

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