| 19 | Aeronautics |
| 58 | Agriculture, Farming and Forestry |
| 55 | Arts and Crafts |
| 55 | Business and Management |
| 27 | Civil Engineering, Building Construction, etc. |
| 33 | Electrical Engineering |
| 7 | Electro-Chemistry |
| 13 | Fuel and its Combustion |
| 21 | Hydraulics and Turbines |
| 10 | Internal Combustion Engines |
| 17 | Iron, Steel, and other Metals |
| 31 | Irrigation and Water Supply |
| 61 | Law, Patents, etc. |
| 39 | Lighting |
| 15 | Machinery, Power Plants, etc. |
| 51 | Manufacture and Industries |
| 20 | Marine Engineering |
| 50 | Mathematics |
| 49 | Metallurgy |
| 23 | Mining |
| 61 | Miscellaneous |
| 19 | Motor-Cars and Engines |
| 30 | Municipal Engineering |
| 57 | Natural History, Botany, Nature Study, etc. |
| 8 | Outlines of Industrial Chemistry |
| 40 | Physics and Chemistry |
| 17 | Pumps |
| 24 | Railway Engineering |
| 26 | Reinforced Concrete and Cement |
| 12 | Steam Engines, Boilers, etc. |
| 29 | Surveying |
| 32 | Telegraphy and Telephony |
| 39 | Thermodynamics | ...
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