The processes of harvesting natural ice, and of delivering it to the consumer, still leave much to be desired. The use of horses whose droppings fall on the ice during the ' ploughing ' or cutting of the ice-fields; the un-
cleanly habits of the workmen employed; the floating of the blocks through less pure, or actually polluted water, on their way to the ice-houses; their storage, often in a packing of old and dirty hay or sawdust; and their final deliverey into family, club or hotel refrigerators by common workmen after only hasty brushing with some ancient cloth or broom,-these conditions illustrate the need of improvement.
There are a great many reasons why ice taken from Nepean bay is not fit for use. In the first place, Nepean bay is the spot where it is estimated most of the poison lies. Water, in freezing, of course, precipitates a large percentage of the bacilli. The ice is purer than the water but un.der certain conditions the bacilli cannot all be removed by the freezing process. For instance, we will take Nepean bay-