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- Horse Armour, sixteenth century
- Brass of an unknown knight
- The Westminster Helm
- Arming a knight for combat in the lists
- Coif of Mail
- The Workshop of Conrad Seusenhofer
- From Romance of Alexander, Bib. Nat., Paris, circ. 1240
- Harnischmeister Albrecht, 1480
- Koster
- Sixteenth-century Suit of Plate
- The Printing Press of the Stanhope Construction
- View of Stereotype Foundry
- Inscription of the Sigean Tablet
- Padded 'harnische-kappe' and helm showing the attachment of the cap, after Dürer
- Comparative size of molecules
An atom is the smallest particle of a chemical element. Two or more atoms come together to form a molecule: thus molecules form the mass of matter. A molecule of water is made up of two atoms of hydrogen and one atom of oxygen. Molecules of different substances, therefore, are of different sizes according to the number and kind of the particular atoms of which they are composed. A starch molecule contains no less than 25,000 atoms. Molecules, of course, are invisible. The above diagram illustrates the comparative sizes of molecules. - Cuissard for the off hock
- The Spectroscope, an Instrument for Analysing Light
This pictorial diagram illustrates the principal of Spectrum Analysis, showing how sunlight is decomposed into its primary colours. What we call white light is composed of seven different colours. The diagram is relieved of all detail which would unduly obscure the simple process by which a ray of light is broken up by a prism into different wave-lengths. The spectrum rays have been greatly magnified. - Mr Bensley's Machine
- Gutenberg
- Thomas Curson Hansard
- The Printing Press of the original construction
- Church of St. Vital, at Ravenna. Byzantine style
- Bulmer
- The Lithographic Star Press
- The Frame
- Frame
Frame - B
B - Baskerville