26 



GROWTH 



The development of one part of the body has a considerable 

 influence on the growth of the rest of the organism. The effect 

 of pinching off flower buds or young fruits on the growth of 

 the balance of the plant is well known. The development in 

 animals of various glands such as the thyroid gland, suprarenal, 



Figure 16. The effect of minute amounts of organic matter upon the growth of a green 

 plant. Left — growth of duckweed in a mineral nutrient solution. Center — growth in 

 same solution plus 4 parts per million of extract of autolyzed yeast. Right — growth in 

 same solution plus trace of extract of peat. After Saeger. 



pancreatic, pituitary, and sex glands have remarkable effects 

 upon growth. 



There is much more that could be said regarding growth and 

 in the following sections various phases of the subject which 

 have been sketched here will be elaborated. The process of 

 growth is a wonderful and remarkable one even in the meanest 

 and humblest of living creatures. No matter how small we are 

 or how poorly our features are collected on our countenances we 

 should never be dissatisfied. We should never regret that we 



