Cocktails of the Sour Type use as modifying agents a fruit juice (typically, lemon or lime) and sugar. For these a ratio of 1 part sweet to 2 parts sour to 8 parts base is generally recommended. However, Embury makes it very clear that he thinks the idea that a drink "must" be made according to one exact recipe preposterous, and that the final arbiter is always "your" taste. He suggests trying different ratios, finding the one that is most pleasing to you, and sticking with it.