Examples from literature

• Anhydrous gypsum is a rare variety, into which water does not enter as a component part. 
• It behaved in fact similarly to the natural anhydrous calcium sulphate which is unaffected by water. 
• The larger mobile species were, then, practically anhydrous. 
• The peroxide precipitated from a nitric solution may, under certain circumstances, be anhydrous. 
• To this last is joined a drying-tube containing chloride of calcium and anhydrous copper sulphate.