164 Mati'iiah and Their Handling 



converted, not only into meats of all kinds, but 

 also into a great number of by-products, such as 

 hides, hair, lard, oleomargarine, beef extract, 

 glue, and fertilizer. A stock joke is that the 

 "squeal" is the only part of the pig which escapes. 

 The great packing plants at Chicago are located 

 close to the stock yards, with a general progression 

 of the materials from the slaughtering pens to 

 the final cold storage. The minor industries, 

 which work up the by-products, are, as far as 

 possible, located with reference to the point in 

 the process at which the by-product they utilize 

 first becomes available. The plants cover a broad 

 area and have great diversity in styles and sizes 

 of buildings, as there is a wide variety in the 

 types of product and, consequently, in the neces- 

 sary machinery and equipment. 



Section II 

 Assembling Industries 



The Complexity of Parts in an Assembling In- 

 dustry. In the last chapter, we saw how the 

 handling of the material in a continuous industry 

 governed the type of buildings used. In each case, 

 there was only one kind of raw material or, at 

 most, only a few kinds. These were manufactured 

 into a single product like sugar or flour, or they 

 were broken up into component elements, as in 

 the packing industry. In no case were new raw 

 materials introduced during later stages of the 

 manufacture. 



