It would be a good idea to have, in all butter factories, apparatus for setting milk so constructed that the temperature of the mass of milk can be gradually and evenly raised to 100 degrees, or even slightly above; for it is difficult to deliver warm milk in a good condition especially in hot weather--if it has to be carried any considerable distance, while in cold weather, it is sure to get considerably reduced in temperature, both in milking and on the road to the factory. Hence, it seems almost absolutely essential, if the best results are to be attained, to have some means of properly raising the temperature of the milk at the factory. COOLING AND AIRING. If milk is to be sent to the factory, for either butter or cheese making, where the distance is half a mile or more, it should be aired and cooled--especially if it is to be shut up in a tight can. This cooling should be done as speedily as possible after milking, to avoid taint or souring. If the milk is kept over night, such airing and cooling are absolutely indispensable. The mode of doing this must vary with conditions and circumstances; but, whatever method may be adopted, we would by no means recommend putting ice directly into the milk. The effect cannot be to improve flavor or keeping quality. PROTECTION FROM THE HOT SUN. By no means should the can of milk be exposed to the direct rays of a hot sun, either on the platform waiting for the delivery wagon, or on the wagon. Give it shelter and shade of some kind, in both cases. If a woolen blanket is wet in cold water and wrapped around the can, the rapid evaporation from the blanket will keep down the temperature. Everything that can be should be done to preserve milk in its normal condition. TREATMENT OF NIGHT'S AND MORNING'S MILK. The night's milk and the morning's milk should never be mixed before starting for the factory, but kept in separate cans and so delivered. The effect of mixing will be seen soon enough at the factory, and often much too soon in hot weather. If the morning's milk were made as cool as the night's, the effect of mixing would not be so speedy and disastrous. But it appears to be an immutable law, that reducing the temperature and then raising it hastens decomposition. A low temperature only retards decomposition; it does not prevent it, unless very low and it is continued. As soon as the temperature is raised, decomposition sets in with accelerated rapidity, as if to make up for lost time. Hence, we have always looked upon low temperatures in the dairy as objectionable. As low as 60 degrees but not below 50 degrees is the limit which we prefer. We think this range more effective for long keeping than a lower one. Certainly, dairy goods made and kept within this range will not go to decay so soon as in a higher temperature. RECEIVING.