1 8 On Stocking. 



Interest on .3000 at 4 per cent., . . .120 

 Depreciation and renewal calculated on 80 



gallons of Ova at 14s., ... 56 



176 Half = 88. 

 Of which one-half is credited to use for fry 



leaving to debit of Ova, . . . .88 

 Add Wages 40s. for 15 weeks, . . 30 



118 



Or, dividing by 80 gallons, 1, 9s. 6d., that is, 1, 2s. and 

 7s. 6d. per gallon respectively. 



A slight reduction may be made on these figures 

 on the ground that a certain number of the boxes 

 can be used twice ; but as this interferes to some 

 extent with their being afterwards used for rear- 

 ing fry I have neglected this item. Now, 1, 9s. 6d. 

 per gallon is for good trout eggs running from 

 26,000 to 32,000 per gallon almost exactly Is. 

 per thousand and this may be taken as an ac- 

 curate base in calculating cost. The cost of a 

 smaller hatching house will probably be not less 

 than the proportional 37, 10s. per gallon, 1 the 

 labour, however, will be unduly increased, and, 

 unless the house is built of substantial masonry, 

 4 per cent, on cost will be too little to debit as 

 rent; and in all small houses the cost of the 

 water supply is so important an item, that unless 

 carefully considered before the construction of 

 the building is commenced, the cost of incubating 



1 The prime cost of the Hatching-house per gallon is 3000, 

 divided by 80 gallons, or 37, 10s. 



