| A | B |
|---|
| design | to make a plan, or drawing, or outline of |
| encouraged | gave help or hope |
| quality | how good or bad something is |
| simple | easy to understand or to do |
| substitute | to put in place of another |
| investigation | the act of looking carefully in order to find facts |
| examine | to look at closely, check |
| solution | the answer to a problem |
| real "McCoy" | the real thing, no substitutes |
| locomotive | the engine on a train |
| grease monkey | oiled parts of the locomotive engine |
| ashcat | shovels coal into the engine's firebox |
| Underground Railroad | a way for slaves to get to the North to be free |
| bearings | they make the wheels go around on a train |
| tinkering | playing around with something |
| grimy | another name for dirty |
| oil cup | oiled the engine of a train while it was running |
