hide Matching Documents

The documents where this entity occurs most often are shown below. Click on a document to open it.

Document Max. Freq Min. Freq
Knight's Mechanical Encyclopedia (ed. Knight) 2 2 Browse Search
View all matching documents...

Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for November 1st, 1665 AD or search for November 1st, 1665 AD in all documents.

Your search returned 2 results in 2 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
ted in 1545. Etching on copper by means of aqua-fortis invented by F. Mazzuoli or Parmegiano, A. D. 1532. Mezzotinto engraving invented by De Siegen, 1643; improved by Prince Rupert, 1648; and by Sir Christopher Wren, 1662. Mr. Evelyn showed me most excellent painting in little [miniature]; in distemper, in Indian incke, water-colours : graveing; and, above all, the whole secret of mezzo-tinto, and the manner of it, which is very pretty, and good things done with it. — Pepys's Diary, Nov. 1, 1665. At Gresham College, the Royal Society meeting, Mr. Hooke explained to Mr. Pepys the art of drawing pictures by Prince Rupert's rule and machine and another of Dr. Wren's [Sir Christopher]; but he [Dr. Hooke] says nothing do like squares, or, which is best in the world, like a dark room. — Pepys, Feb. 21, 1666. These devices are apparently for copying; the former is probably on the principle of the pantograph; the squares is a familiar mode of reducing or enlarging by ruling off i
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
ice of the Landgrave of Hesse Cassel. Portraits executed by him exist, having the date of 1643. Prince Rupert gave so much attention to it, and was so instrumental in bringing it into favor, that he has been credited with the invention. Sir Christopher Wren has also been cited as the inventor, but his claims are antedated by Prince Rupert. Mr. Evelyn showed me the whole secret of mezzo-tinto, and the manner of it, which is very pretty, and good things done with it. — Pepys's Diary, November 1, 1665. The process consists in passing over a plate of steel or copper with an instrument called a cradle, by which a burr is raised over every portion of the plate, which, if filled with ink by the printer, would make a black impression. On the surface thus prepared, the lights and middle tints are burnished or scraped away; the burr being more or less perfectly removed, according to the gradation of light required. The plate is untouched in the parts intended for the darkest tint. The