RENEWAL OF WORKING PLANS. 347 



(b) Investigation of the extent to which the provisions of the 



former working plan were judicious and appropriate. 



(c) Preparation of a new working plan, hased upon : 



(1) The old working plan. 



(2) The corrected records and maps. 



(3) The results of past yields in money and material. 



(4) The account of past works of formation, tending, 



and improvement. 



