Summary

John Chiene Encyclopædia Britannica, Ninth Edition (1888)

When such concretions are so small that they can be passed with the urine through the urethra they are known as gravel; but when they are prevented by their size from passing along the urethra they are termed calculi, and the patient is said to suffer from stone or calculus. Calculus of the bladder constitutes a most formidable and important disease, and its treatment, either medical or surgical, has probably attracted more attention than that of almost any other disease. Urinary calculi occur in all parts of the world and affect both sexes.
Source: Wikisource

John Chiene Encyclopædia Britannica, Ninth Edition (1888)

It sometimes remains after an acute attack has passed off, but more commonly it results from long-continued irritation, such as may be produced by a urinary calculus in or by atony of the bladder. The symptoms are not so severe as in acute cystitis: the urine contains more mucus, but less pus and blood, and there is much less tendency to frequent micturition, the irritability of the bladder being greatly diminished. Frequently very large quantities of mucus are secreted, and the condition is then termed "catarrh of the bladder." Chronic inflammation is not in itself dangerous
Source: Wikisource

John Chiene Encyclopædia Britannica, Ninth Edition (1888)

Calculi vary much in their physical characters and chemical constitution. Most frequently only a single stone is present; but very large numbers have been removed from one bladder. The shape of the stone depends on whether it be movable or fixed, and whether there be only one or more in the bladder. A single stone is usually spherical or ovoid, but may be smooth or tuberculated or spinous, this last point being determined chiefly by the composition of the stone; when there are a number of stones present they are usually faceted or many-sided. Some stones are hard; others are soft.
Source: Wikisource

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