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Title: To the Manufacturers and Mechanics of Pennsylvania, Philadelphia, the Northern Liberties, and District of Southwark; No. 878 To the Manufacturers and Mechanics of Pennsylvania, Philadelphia, the Northern Liberties, and District of Southwark
Identifier(s): text:353743
Description: Announcement of a meeting to be held on 9 June to consider a letter from the mechanics of New York and also to adopt measures to unite them and to "animate and administer relief and solid comfort to our brave suffering countrymen in the besieged capital of MASSACHUSETTS-BAY."; Printed
Subject: Mechanics
Date: 1774-06-08; 2023

Title: Paul Ehrenfest, J. M. Burgers and Father Burgers.
Identifier(s): graphics:3116; APSimg7550; Graphics Number: U4-7-26
Description: Half length group portrait of Ehrenfest, Burgers and Burgers sitting at table.
Source: Archive for the History of Quantum Physics (Mss.530.1.Ar2); http://amphilsoc.org/mole/view?docId=ead/Mss.530.1.Ar2-ead.xml
Subject: Math & Physics ; Burgers, J. M. (Jan Martinus), 1895-1981; Ehrenfest, Paul, 1880-1933; Physicists; Quantum mechanics
Date: ca. 1917