FACTORY OPERATIONS. 



15 



weight peas are good, but harder than the first grade, of darker color, 

 and not so uniform. These differences are most apparent before the 

 canning is done, though they are readily distinguishable in the can, 

 and also show on chemical examination. 



In any load of peas there must be some plants more mature than 

 other-, ami a- a conMM|iience. xrnie hard peas will be mixed with the 

 tender ones. Every effort is made to cut the peas at nearly the same 

 of maturity, but no field will ripen perfectly evenly. If the 





Fi.;. 4. Separation >f three grades of peas by suspension in salt solutions: 

 () Weak Mil l-rin.- isp. irr. 1.O40) : (61 strong salt brine (sp. gr. 1.070 . 



peas be produce,! by a hundred farmers, the differences will be accen- 

 tuated. In localities where the peas mature slowly, the differences 

 will l,r less marked than where they mature rapidly. Under any 

 condition-- theiv will be some differences in quality, and under un- 

 favorable conditions the percentage of poor peas may be very high. 

 Separation for quality is so well effected by the specific gravity grader 

 that it undoubtedly will receive a recognition equal to that given the 

 machine. 



