Section of Differential 51 33. Side View of Differential Wheel 51 34. Top View of Differential Wheel 52 34a. Differential Gears 53 35. Radius Rods 56 36. Torque Tube 57 37. Chain Drive 58 38. Shaft Drive 60 39. Straight Line Drive 60 40. Cone Clutch 63 41. Multiple Disk Clutch 65 42. Progressive Transmission. Low 70 43. Neutral Position 71 44. Intermediate 72 45. High 73 46. Reverse 75 47. Selective Transmission. Low Gear 77 48. Intermediate 78 49. High 79 50. Reverse 80 51. Progressive Control Mechanism 81 52. Selective Control Mechanism 83 53. 3-Speed 85 54. 3-Speed 85 55. 3-Speed 85 56. 4-Speed 85 57. 4-Speed 85 58. 4-Speed 85 59. 4-Speed 85 60. Control-Lever Bracket 86 61. Planetary Transmission 88 62. Frictional Transmission 89 63. Firing Position 94 64. Return First Cycle 94 65. Drawing in Charge 96 66. Compression 96 67. Automatic Inlet Valve 98 68. Calculating Efficiency 100 69. Two-Cycle Expansion Position 102 70. Exhausting 103 71. Compression 103 72. Crank Shaft 104 72a. Increasing Cooling Area 110 73. Movement of Heated Water 111 74. Cooling System 112 75. Radiator Type 114 76. Side View of Pump 116 77. Section 116 78. Carbureter Float and Needle 123 79. Carbureter Inlet Valve 124 80. Carbureter Discharge Port 125 81. Carbureter Secondary Air Inlet 127 82. Complete Carbureter 128 83. Surface Carbureter 131 84.