Contributions from 

 The Museum of History and Technology: 



Paper 20 



John Ericsson and the Age of Caloric 



Eugene S. Ferguson 



THE BUILDER 43 



THE "ERICSSON" AND HER ENGINE 44 



THE TRIAL OF THE "ERICSSON" 45 



STATE OF THE ART 47 



PERFORMANCE FIGURES 49 



THE GRAND PRINCIPLE 52 



ESTIMATE OF POWER DEVELOPED 59 



