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Quarterly Journal of Microscopical Science, Vol s3-98, 1-8, Copyright © 1957 by Company of Biologists
1 Department of Zoology and Comparative Anatomy, University Museum, Oxford; Present address: Department of Zoology, Birkbeck College, Malet Street, London, W.C. 1
An account is given of three tissues which are suitable for use as standard objects when attempting methods that are said to reveal calcium salts in tissues. The tissues are the digestive gland of the snail Helix, the gut diverticulum of the crab Carcinus, and the left colleterial gland of the cockroach Periplaneta. They contain respectively calcium carbonate, calcium phosphate, and calcium oxalate deposits. The deposits are little, if at all, contaminated with other calcium salts.