Engine Building in Newark. Introduction of Harris Tabor 259 CHAPTER XXV Engine for the Cambria Iron and Steel Company 271 CHAPTER XXVI My Downward Progress 275 CHAPTER XXVII My Last Connection with the Company 325 CHAPTER XXVIII The Fall and Rise of the Southwark Foundry and Machine Company. Popular Appreciation of the High-speed Engine 331 LIST OF ILLUSTRATIONS PAGE 1. My First Mechanical Drawing. Longitudinal Section of my Stone- dressing Machine 7 2. The First Porter Governor 21 3. The Porter Marine Governor 37 4. Porter-Allen Engine. Diagram of Admission--Valve Movements 48 5. Vertical Adjustment of Sustaining Pin for Trunnions of the Allen Link 52 6. My Improvement in Cranks and Journal Boxes 54 7. My Improvement in Eccentrics 56 8. Diagram from the First Allen Engine taken with the First Richards Indicator 59 9. Mr. Porter’s Exhibit at the London International Exhibition, 1862 71 10. Diagram from Allen Engine in London Exhibition of 1862 73 11. Spring-testing Instrument Used in the Manufacture of the Richards Indicator 86 12. Plan of Spring-testing Instrument 89 13. Diagrams from English Locomotives, taken with the Richards Indicator 91 14. Engine Bed Designed by Mr. Porter 95 15. Cross-head Designed by Mr. Porter 96 16. Connecting-rod and Strap 99 17. Attaching a Steam-drum to a Lancashire Boiler 107 18. Diagrams from Engine of Evan Leigh, Son & Co. 114 19. Condenser and Air-pump Designed by Mr. Porter. (Cross-section) 118 20. Diagrams from Engine Built for Mr. Adams 138 21. Exposition Universelle, Paris, 1867. Diagrams from the “Allen” Engine Employed in Driving Machinery 142 22. Pair of Diagrams from 18×30 Allen Engine at South Tyne Paper Mill, 108 Revolutions, Vacuum 28 Inches. Only Half Intended Load on Engine 160 23. Cross-section of Machine Shop Proposed by Mr. Porter in 1868, after the Design of Smith & Coventry 168 24. Card from Allen Engine in Colt’s Armory 178