TREND IN MASSACHUSETTS INDUSTRIES 31 



Principal Data for the Leading Manufacturing Industries of Massachusetts 

 ALL INDUSTRIES, 1913 - 1933 



BILLIONS 

 or DOLLARS 



VALUE OF PRODUCTS 



13 15 17 19 21 23 25 27 29 31 33 



or dollars VALUE ADDED BY MANUFACTURE 



2 r 



I I ll llll I I I 



13 15 17 19 21 23 25 21 29 31 33 



