APPENDIX 



The following practices are inserted by way of suggestion to 

 students who desire to pursue the subject further, and to obtain 

 more information in regard to their own soils. Other lines of work 

 may be followed out at the discretion of the instructor. 



Those students who are preparing to teach the subject should 

 perform these experiments together with all of those (already given) 

 marked " To be done by the instructor." 



63 



