Appendix E 399 



band of adhesive tissue over the larger stems. Arrange the 

 specimens, if possible, so that you have at least one variation 

 on a sheet. 



7. Put the label on the lower right-hand corner, leaving a 

 small margin. Attach the label to the mounting sheet with 

 glue or paste, putting it only on the left edge of the label, that 

 is, do not cover the back of the label with paste or glue. 



SAMPLE OF LABEL 



HERBARIUM OF VARIATIONS 



DEPARTMENT OF PLANT-BREEDING. NEW YORK STATE 

 COLLEGE OF AGRICULTURE 



Name 



Locality Date 



Habitat 



Description of variation 



Class of variation 



Collector . . . . No. 



8. Before the specimen is handed in, fill in as many of the 

 blank spaces on the label as possible. Place your name after 

 the word " Collector." Fill in both the scientific and common 

 names. 



9. Absolute neatness is essential. 



EXERCISE 2 



The Statistical Study of Type and Variability 



Making measurements. The value and uses of the statistical 

 method of studying variation are explained in Chapter IV. In 

 dealing statistically with a group of organisms, or parts of them, 

 the first step in the procedure is, of course, to collect data. These 



