1. A DRY COMPOSITION WHICH IS READILY DISPERSIBLE IN WATER WITHOUT LUMPING CONSISTING ESSENTIALLY OF A MANNOGALACTAN GUM, AT LEAST ABOUT 0.5% BY WEIGHT OF THE GUM OF A SODIUM BORATE, AND AT LEAST ABOUT 0.5% BY WEIGHT OF THE GUM OF A WATER-SOLUBLE ACID SALT SELECTED FROM THE GROUP CONSISTING OF MONOSODIUM PHOSPHATE, ALUMINUM SULFATE, AND AMMONIUM CHLORIDE; SAID SALT BEING COATED WITH A POLYETHYLENE GLYCOL HAVING AN AVERAGE MOLECULAR WEIGHT OF AT LEAST ABOUT 2,000 AND THE COMBINED AMOUNT OF BORATE AND ACID SALT BEING NO GREATER THAN ABOUT EQUAL TO THE AMOUNT OF GUM IN THE COMPOSITION.