Observations on the principal defects of the public edifices and architectural ornaments of London

A touch-stone for gold and silver wares. Or, a manual for goldsmiths, and all other persons, whether buyers, sellers, or wearers of any manner of goldsmiths work discovering the rules belonging to that mystery, and the way and means to know adulterated wares from those made of the true standard allay, and what are the true weights appointed for weighing of the same