| A | B |
|---|
| almanac | an annual plublication full of brief information on many subjects |
| calendar | a chart showing months, weeks, and dates of the year |
| circulating | distributing |
| electricity | a form of energy that produces light and heat |
| experiment | a trial or test |
| inventions | something new that someone makes or thinks of |
| mysterious | hard to explain or understand |
| theory | an explanation based on observation and reasoning |
| apprentices | unpaid assistants who learn a trade through experience |
| circuits | paths over which electrical currents flow |
| generated | produced |
| printshop | a place where printing is done |
