Healthy houses : a handbook to the history, defects and remedies of drainage, ventilation, warming and kindred subjects, with estimates for the best systems in use and upwards of 300 illustrations / by William Eassie.
- William Eassie
- Date:
- 1872
Licence: Public Domain Mark
Credit: Healthy houses : a handbook to the history, defects and remedies of drainage, ventilation, warming and kindred subjects, with estimates for the best systems in use and upwards of 300 illustrations / by William Eassie. Source: Wellcome Collection.
Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.
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![gourmands delight to honour. In xiustralia, Jack Frost is now also conjured up by the spell of the air or spirit machine, and our American cousins have thus lost another consumer of their lake produce. The frequent production, in late years, of these ice-making machines, of an intermittent character, for family use. has already exerted an acknowledged influence over the import of block ice from distant countries, and will, doubtless, lead to a distinct preference for the home-made product. The confectionary genius of our Gallic neighbours first gave an impetus to these machines of the more domestic class; and if they have not become general here, and re- placed the mere cooling-machines, where freezing powders are used, it is because the genius of oxir country has been occupied with the larger machinery of this kind for industrial purposes-I mean those needed to produce the desirable amount of cold in our breweries, candle factories, soda works, and the like. In a similar manner. ,the stiU increasing cost of animal food at home has compeUed the att^- tion of our best chemists and engineers to the production of proper cooling-chambers for the reception of the carcases on the voyage home from the BrazUs or the Antipodes, the maintenanoe of frigidity being one thing needful for success. ICE MAiCfilN-EET. Cooling and ice machinery have been practically divided into two classes. 1st, those in which heat is directly applied in order to produce cold-as, for instance, in the air machines, where the air is first compressed and subsequently expanded; and in the efter machines, where the evaporation is eff-ected in vacuo, the speed of the process being accelerated by the use of an air-pump; and 2nd those machmes in which cold is produced by direct heat without the aid of power, as, for example, in the latest Ammonia machine. Each machine has, nevertheless, its partisans, and dire battle is done cccasiana ly; ink has flooded flelds of paper, and thousands of broken pens must have strewn the lists. It is claimed for the air machine that It requires the assistance of no chemical agents; that the machinery acts d:.ect upon the air and water; and that it wiU produce cold air, refrigerate fluids, or make ice continuous]; as](https://iiif.wellcomecollection.org/image/b23982585_0221.jp2/full/800%2C/0/default.jpg)
