X INTRODUCTION 



The following is a list of apparatus needed to equip the lab- 

 oratory : 



6 hand-lenses 



12 1-pint fruit jars (Mason, with screw tops) 

 1 torsion balance 



1 drying oven 



12 evaporating dishes 

 6 rulers 



2 tape measures 

 12 500-c.c. beakers 

 12 porcelain pie pans 



1 large sheet of blotting paper 



2 boxes of gummed labels 



1 large tin can for seed samples 

 J yard No. 19 bolting cloth 



The above apparatus may be obtained from the following 

 companies : 



Central Scientific Co., Chicago, Illinois. 



University of Nebraska, Department of Instructional Agron- 

 omy, Lincoln, Nebraska. 



W. M. Welch, Scientific Company, 1516 Orleans St., Chicago, 

 Illinois. 



"We are indebted to the Department of Agricultural Journal- 

 ism of the Iowa Agricultural College and to the United States 

 Department of Agriculture for the cuts shown in the manual. 



