Perry which are cold-filtered rather than pasteurised. Higher quality pear cider is sold in champagne-style bottles (cidre bouché). Many pear ciders are sold in corked bottles, but some screw-top bottles exist. In the Mostviertel region of Lower Austria, '' is a traditional fermented alcoholic beverage made from the unfiltered juice of pears. In some parts of Austria, Most can also be made of apples or a combination of apples and pears. Perry Perry is an alcoholic beverage made from fermented pears, similar to the way cider is made from apples. It has been common for centuries in England, particularly in the
Gravity (alcoholic beverage) Gravity (alcoholic beverage) Gravity, in the context of fermenting alcoholic beverages, refers to the specific gravity, or relative density compared to water, of the wort or must at various stages in the fermentation. The concept is used in the brewing and wine-making industries. Specific gravity is measured by a hydrometer, refractometer, pycnometer or oscillating U-tube electronic meter. The density of a wort is largely dependent on the sugar content of the wort. During alcohol fermentation, yeast converts sugars into carbon dioxide and alcohol. The decline in the sugar content "and" the presence of ethanol (which is appreciably less dense than