Spelling and Writing Exercise. 173 



Post-office Department. These carried millions of let- 

 ters. Sixty-two were sent off in all during the siege, most- 

 ly at night, so as to escape the observation of their ene- 

 mies, the Germans. 



9. In spite of all precautions, several fell within the ene- 

 my's lines. One was fired at while crossing the Prussian out- 

 posts. Several were carried outside of France. One was 

 swept into Norway, and landed 600 miles north of the city 

 of Christiania. Three were never heard of after they set 

 out, and were most probably lost in the Atlantic Ocean. 



10. Some men who wished to get out of the besieged 

 city went in these balloons as passengers. Among these was 

 a member of the Provisional Government, the now famous 

 Gambetta, who, voyaging safely through the air, arrived at 

 the city of Tours, where he joined his colleagues in the 

 government. 



SPELLING AND WRITING EXERCISE. 



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Why does a balloon rise in the air ? What causes it to 

 come down ? What about the temperature of the air 

 through which it ascends ? 



