PRESIDENTIAL ADDRESS. 39 



of the value of 6 cb. in. of coal gas, and an approximate 

 annual value of f d. The saving is small, but it is a good 

 example of waste-utilisation. 



Various Industries. 



There is no waste in the manufacture and refining of 

 sugar and in the grinding of wheat. In the dairying 

 industry there does not appear to be any waste at present 

 as owing to the high value of stock, all the by-products of 

 milk, such as separated milk and whey, are being entirely 

 utilised. We, however, import casein and milk-sugar from 

 New Zealand, both of which could be made locally. The 

 whey returned from the cheese makers contains a small 

 amount of proteid, 1%, and milk-sugar, 5%. Every 100 

 gallons of whey which the farmer takes home from the 

 factory contains the equivalent of 70 lbs. of pollard which 

 has a value of 3/9d. The same quantity of whey would 

 yield theoretically 50 lbs. of milk-sugar, which at the low 

 figure of say 6d. per lb. would be worth 25/-. There appears 

 to be room for a profitable production of a certain quantity, 

 say 5 tons, of lactose, but if the industry became large, the 

 difficulty of disposing of the product might be considerable. 



It is the same with lanolin about the utilisation of which 

 we have heard so much of late. A ton could be disposed 

 of easily enough, but there would be a difficulty in disposing 

 of say 400 tons, and the lanolin or cholesterin could be used 

 for no other purpose than as a vehicle for ointments, the 

 demand for which is limited. It is useless for soap-making. 

 Enough is now being made in Sydney for local requirements. 



It seems strange that the by-products of the wine 

 industry are not worked up in this country where the vine 

 is grown. At the beginning of the war, tartaric acid and 

 bitartrate were practically unobtainable. Theoretically 

 we should be able to produce about four and a half tons of 



