APPENDIX 241 



SUPPLEMENTARY FORMULA 



r (i.op* - i) | i.op b + ^ (i.op- i). (Ilia) 

 R(i.op n - i). (Illb) 



(Xa) 



+ ^0^-? 



DEFINITIONS OF SYMBOLS 



a Year, previous to w, for which value or cost of property 

 is sought. 



d Im f , ratio used in Formulae P 3 and P 4 in deter- 



o.op 



mining the amount (Z) to be written off annually 

 for profit and depreciation. 



e Annual expenses, constituting one year's net outlay. 



g First term of a geometric series. 



m Interval between intermittent yields in a many-aged 

 forest. 



n Period required to produce a crop of timber. Rotation. 

 Interval between yields produced by even-aged stands 

 of timber. 



p Standard rate of interest in forestry. 



q Ratio, or multiple, for a geometric series. 

 q% Per cent of legitimate profit to be allowed in logging 

 and milling, or in logging alone, in stumpage ap- 

 praisals. 



r Annual rental, regarded either as income or outlay. 



r' Intermittent rental, due at regular intervals greater 



than one year. 



r% Per cent of legitimate profit to be allowed in milling 

 alone, in stumpage appraisals. 



5 Per cent of overrun per thousand board feet, log scale. 



/ Number of payments expected in a temporary inter- 

 mittent rental. 



