LIST OF ILLUSTRATIONS. 



PLATES. 



Facing page — 



1. The East Hall. Contains mechanical and electrical engineering col- 



lections Title. 



2. The " John Bull " locomotive. The oldest complete locomotive in 



America 64 



TEXT FIGURES. 



Page. 



1. The combined application of the roller, lever, and inclined plane 10 



2. The rolling load 10 



3. The Leffel turbine 13 



4. The earliest steam engine with a piston, 1690 17 



5. Ericsson steam engine, 1849 25 



6. Schlarbaura oscillating steam engine, 1863 26 



7. Worthington steam pump, 1859 27 



8. Corliss steam pump, 1879 28 



9. Miller rotary engine, 1859 29 



10. Piatt rotary engine, 1862 31 



11. Whiting air and steam engine, 1879 34 



12. Ericsson air engine, 1855 35 



13. Ericsson air engine, 1880 37 



14. Perry gas engine, 1846 38 



15. Errani and Anders oil engine, 1873 40 



16. Hock oil engine, 1874. The first successful one 41 



17. Brayton oil engine. Oil under pressure, 1874 42 



18. Otto gasoline engine. The first 4-cycle motor, 1877 44 



19. Langley aerodrome engine, 1901 45 



20. Haynes 6-cylinder automobile engine, 1914 47 



21. Four-cylinder gasoline automobile engine, 1921 50 



22. Murdock road locomotive, 1874 55 



23. Praul steam tractor, 1879 57 



24. Duryea gasoline automobile, 1892-1893 58 



25. Haynes gasoline automobile, 1893-1894 60 



26. Olds gasoline automobile, 1896 61 



27. Shaft-driven Autocar, 1901 62 



28. Trevithick locomotive, 1804 ^ 65 



29. Stephenson "Rocket," 1829 _* 68 



30. Stevens experimental locomotive, 1825 70 



31. Horsepower locomotive, " The Flying Dutchman," 1830 71 



32. Reproduction of the original " Stourbridge Lion " locomotive 74 



33. Peter Cooper experimental locomotive, 1829 75 



34. The "Best Friend" locomotive 77 



