INTRODUCTION. 15 



if the student does as much of it as he can unassisted. 

 Although at times less ground may thus be covered in a 

 given period, more ability to do scientific work is developed. 

 Through this means the results have the very great value 

 of individuality, rather than the much smaller values that 

 come through the constant attempt at being in conformity 

 with detailed suggestions given by another. 



