APPENDIX 



SECTION II 

 SUGGESTIONS TO TEACHERS 



The laboratory work of this manual is outlined to meet the needs 

 of secondary schools giving a year's instructional work in agri- 

 culture. It is impossible to give satisfactory instruction in agri- 

 culture without practical demonstrations, which can only be given 

 in the field and laboratory. In planning this laboratory manual 

 the authors have assumed that five periods a week will be devoted 

 to the subject of agriculture : three to be used for classroom and 

 lecture work and two periods of one and one half or two hours' 

 duration to be spent in the laboratory and field. Since it is occa- 

 sionally necessary to make short trips and excursions during the 

 laboratory period, it will be found most satisfactory to devote the 

 last periods in the afternoon to this work. If this is done, it will 

 be possible to make longer trips than could be made if the work 

 occurred at some other time of the day. 



Suggestions concerning Equipment. The list of equipment 

 given in Section 1 of the Appendix gives in detail all apparatus 

 and supplies required to carry out successfully the exercises given 

 in the manual. Very few schools will find it necessary to purchase 

 this entire list of equipment, for most schools are well equipped to 

 teach laboratory work in botany, chemistry, and physics. Ordi- 

 narily the same microscope, balances, scales, and much of the glass- 

 ware that are used for botany, chemistry, and physics may also 

 be used in agriculture, to avoid the expense of duplication. 



Soils. There are a number of exercises in soils that demand 

 special equipment. It is to the best interest of the work to provide 

 this equipment when possible. Where funds are limited, less ex- 



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