The plate-glass-book : Consisting of the following authentic tables. I. The value of any looking-glass when finished, and fit for framing. II. The glass-house table; shewing the value of the rough-plate, and also of the rough-plate and duty. III. The prices of grinding, polishing, silvering, and diamond-cutting the several marks or sizes. IV. The value of a looking-glass when accidentally broken, or designedly divided. V. The several discounts made at the glass-houses. To which is prefixed, an explanation of the tables: and a preface, demonstrating the fallibility and incorrectness of all written tables and wooden rules, for the valuing of plate-glass. With some observations concerning the nature and antiquity of glass in general. Of plate or looking-glass; of the ingredients of which it is made, and the time it requires for founding; of the manner of grinding, polishing, and silvering it. Also of the different colours of plate-glass; and at what rate the several hazards attending the working, silvering, framing, and packing of it ought to be estimated. Also of mirrors both concave and convex. By a Glass-House clerk. The fourth edition, enlarged. To which is added, the compleat appraiser. Consisting of ninety-odd tables, with instructions for the valuing of kitchen and household furniture, &c. &c.