QUANTITY OF GROWTH. 269 



With three subjects, A, B, C, growth or movement 

 may occur in each separately, or we may have 

 coincidence in the following combinations : A, B, C, 

 AB, AC, BC, ABC. We may, then, in considering 

 the growth, or any other action or function, in two 

 or more subjects have coincidences, combinations, 

 sequences, series. 



As to the attribute Quantity of growth or move- 

 ment in two subjects. We may find equal quantities 

 (in equal times) in each subject, or unequal quantities. 

 We may, then, in considering the growth, or any 

 other action or function, in two or more subjects, 

 compare the ratios of growth. We may, in two or 

 more subjects, compare the same function as to the 

 attributes time and quantity. 



I. " Arthur and John are twin brothers, and they 

 are very much alike." 



Further observation and analysis may enable us 

 to write thus : 



II. " Arthur and John are twin brothers ; they are 

 alike in height, form, and proportions of the head 

 and body ; they are also alike in their manner of 

 walking and speaking." 



Paragraph I. is a mere arbitrary statement, pre- 

 senting a proposition. Paragraph II. is a proposi- 

 tion giving also some evidence. Let us analyze the 

 evidence, and the statement made. 



(1) " They are alike in height, form, and propor- 

 tions of the head and body." All these points are 

 statements concerning trophic action, and they are 

 capable of further analysis and description. 



(2) " And they are alike in their manner of walk- 



