For the attention of John Faus Quarts and an Apology! John: On checking back on my eMail transmission of the 6th. July, I have been rather alarmed to read that because of a miscalculation in the rate I had used to convert quarts into litres I wrote:- " A minimum intake of 3 quarts liquid is programmed and usually met" This is wrong. The figure "3" should read "2". As a matter of possible interest, my explanation for having made the wrong calculation is the naming of the more unusual measurement of a "Quart". I live in Switzerland whereas I was brought up on Scottish pints! Here, we think in litres and decilitres. To confuse matters even more, the US quart and the UK quart are not the same! 1 x US fl. Quart = 0.9463 litres 1 x UK fl. Quart = 1.137 litres If a glass of water holds 2dl., then, with 2 quarts during the 24 hours, I would be drinking up to an equivalent of nine to ten glasses according to the US volumes, whilst, using British quarts, the result would be about eleven glasses. But never a daily intake of 3 quarts or fifteen and seventeen glasses respectively. Meanwhile, List readers will have seen the brief and informative note from Carolyn Eberly. On the 7th. July, she wrote that her husband's best results are achieved from "eight to ten glasses per day". This is the figure that would seem to be about right. Some time ago too, one wise man wrote to the List on the subject of constipation:- "Don't forget, water is not only efficient, but usually, it is cheap!" Once more, sorry for my hiccup! RAE [log in to unmask] (rae paterson)