WINCHESTER 



6309 



WIND 



WIN 'CHESTER, MASS., an attractive resi- 

 dential town in Middlesex County, eight miles 

 northwest of Boston. It is served by the Bos- 

 ton & Maine Railroad and by interurban lines. 

 Beautiful homes, a public library, a home for 

 aged people, the state aviary and Middlesex 

 Fells, a state park of more than 3,000 acres 

 partly within the town, are its most interesting 

 features. Practically the only industrial plants 

 manufactories of felt goods, leather, ma- 

 chinery and watch hands. Winchester was set- 

 tled in 1638 and was then called Waterfield. 



The lamp heats the air in the box, and as it 

 becomes heated it expands and rises, escaping 

 through the opening in the lid. This move- 

 ment lessens the pr -<>ure of tho air in the box, 

 and the greater pressure on the outside forces 

 air through the openings to take the place of 

 that escaping. Were the lamp burning in the 

 open air it would cause the same currents, but 

 they could not be so easily detected. 



Causes of Wind. What may be illu 

 on a small scale by the box and lamp is takmp 

 place continuously on the earth on a large scale. 



THE WINDS ON THE OCEANS 



Unobstructed by land masses, the winds on the sea take the general direction of the arrows In 

 the illustration. They are Identified as follows: (1) Occasional northeasterly winds; (2) westerly 

 winds; (3) northeast trade winds; (4) monsoons; (5) southeast trade winds ; (6) strong westerly 

 winds. 



Charlestown Village was the name adopted in 

 1640, which gave place to Woburn in 1642, and 

 that was replaced by the present name in 1850. 

 Population in 1910, 9,309; in 1916, 10,603 (Fed- 

 eral estimate). 



WIND. The general circulation of the at- 

 mosphere may be illustrated by the following 

 experiment: Take a box nine or ten inches 

 square, cut holes in the sides near the bottom, 

 and a hole about four inches in diameter in 

 tho center of the lid. Place a lighted lamp in 

 the box, close the lid and test the openings for 

 air currents. It will be found that air is enter- 

 ing the box thmuch each of the openings at the 

 bottom and that it is escaping ihnn-.-h the 

 opening in the lid. The explanation for this is 

 as follows: 



We live at the bottom of a vast atmospheric 

 ocean whose ebb and flow are as ceaseless as 

 those of the sea, and to these movements of 

 the atmosphere the term wind is generally ap- 

 plied. The experiment shows that dil; 

 in temperature is accompanied by difference in 

 pressure. It is the unequal temperature of the 

 atmosphere ov -r different parts of the earth 

 that is the rhiof cause of wind. A wind i> 

 named according to the direction from which it 

 blows. An cast wind, for instance, blows from 

 the east. 



The cause of wind is readily understood by 



a study nf the P ilation of the atmos- 



theoretically shown in the accompany- 



.:ram. The region along the equator is 



tin- nio-t intensely heated of any part of the 



