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Page 698 of 698
Shelfmark
Maker
T. J. Marshall & Co. Ltd
Title
Paper Testing Machine
Description
First page: name of firm, illustration of paper testing machine.
On reverse: typewritten letter dated 25th October, addressed to Messrs Seargent Bros.. Ltd., Usk Vale Works, Abergavanny:
‘Dear Sirs, Ref. SOS/K3: Replying to your favour of the 24th inst., we think that you have the old type of Paper Testing Machine, and we are sending hearwith leaflet giving instructions as to the use of same. Enclosed also, we are sending circular describing our new machine’.
Pages 2-5: Analytical report of the machine by R.W. Sindall, esq., F.C.S., May 26th 1903, giving results of various tests of the strength of paper.
Page 6: Directions for using the machine, with a labelled diagram. Advertisement for ‘Dandy Rolls’ made by T.J. Marshall and Co., Ltd.
Shelfmark
Maker
Carl Zeiss; Jena
Title
Zeiss Binoculars
Description
Instructions on how to use binoculars:
- Adjustment of the Binocular to the Distance between the Eyes
- How to Focus the Binocular
- The Case
- Adaptation to abnormal Eyes
- Cleaning. Repairs
Printed illustrations accompany the instructions.
End page has list of other catalogues that can be obtained from Zeiss.
Shelfmark
Maker
Townson & Mercer; Limited
Title
Catalogue of Physical Apparatus for Sound, Light, Heat, Frictional and Voltaic Electricity, Hydrostatics, Pneumatics, Mechanics, Elementary Science, Physical Geography, Metrology and Mathematical Instruments, also Botanical Apparatus, Diagrams, Geometrical Models, General Physical Laboratory Apparatus, Benches, Tools and Fittings.
Description
-Catalogue of physical apparatus (teaching models and other teaching equipment, telescopes, microscopes and accessories) with printed illustrations and prices.
- Reference pages of weights and measures.
- Page showing the medals and diplomas that have been awarded to the company.
Shelfmark
Maker
Cambridge Instrument Company; LTD.
Title
Cambridge Physical Instruments.
Description
Pictures and short descriptions of the technical specifications of instruments.
Shelfmark
Maker
Baird & Tatlock (London) Ltd.
Title
B.T.L. “Stabilitas” Hot Air Ovens
Description
Front page: Description of hot air ovens, with illustration, catalogue number and prices.
Reverse: Advertisement for a selection of BTL thermostat ovens.
Shelfmark
Maker
Cambridge Instrument Co. Ltd.
Title
Ultra-microtome (A.F. Huxley Pattern)
Description
Pictures and short descriptions of the technical specifications of instruments.
Shelfmark
Maker
Carl Zeiss; Jena
Title
Dipping Refractometer
Description
Description of the dipping refractometer, with illustrations and diagrams throughout.
- Purpose and scope of the dipping refractometer, list of substances that have been treated by means of the dipping refractometer
- The method of measurement (includes diagrammatic section of the dipping refractometer)
- Table for the calculation of the scale divisions of the refractometer
- The manipulation of the dipping refractometer
- Cross-section diagram of the apparatus
- Spiral heater and water-pressure regulator
- Tempering bath
- Table for direct calculation of the scale divisions, percentage of Albument at 17.5 degrees Celsius, with the Dipping Refractometer
- Terms of business and list of prices (in Marks)
- List of other optical measuring appliances made by Zeiss
- Appendix: Dipping Refractometer with interchangeable prisms, list of prices for refractometer and accessories.
Shelfmark
Maker
Griffin & George Limited
Title
Instruction Sheet: Making models of chemical structures using Griffin ‘Grifzote’ spheres
Description
Description of polystyrene spheres used to make models of chemical structures.
- General description of the spheres.
- Description of 2 types of model: tangential contact models for modelling atoms and molecules of elements and compounds (both organic and inorganic), and space-filling models to indicate how electron clouds overlap in space.
- Practical details of model construction.
- Photographs of the models depicting various molecules.
- Geometric diagram of the tangential contact and space-filling molecules as illustrated by the water molecule H20.
- Geometric diagrams of marking spheres at the most common angles and of marking out tetrahedrally with protractor.
- Paper patten details for space filling model of the formaldehyde molecule CH20, and for a benzene ring.
- Tables of covalent, ionic and Van der Waal’s radii; of some common structures; and of the Institute of Physics colour code for the models
- References and useful reference books
- Addenda: techniques for connecting the spheres together and for marking out speheres using dividers instead of a protractor.
Shelfmark
Maker
Optical Works Ltd.
Title
Optical instruments and accessories
Description
Catalogue of optical instruments.
- Cover: photograph of a Schlieren mirror
- Catalogue of optical instruments, with specifications but no illustrations or prices. Includes 6-inch and 7-inch Schmidt cameras designed for stellar photography; collineator and compound reflector; Schlieren mirrors for use in wind tunnels and other fields where air disturbance is important; proof planes from crystalline quartz, fused quartz, Pyrex glass and plate glass; crystalline quartz prisms, plane parallel plates and condenser lenses; fused quartz (available for cutting, grinding and polishing); fused quartz windows; plano-convex and bi-convex lenses; negative lenses; quartz condenser lenses; glass prisms; six-inch and 8-inch F6 telescope; galvanometer mirrors.
- Price list inside back cover dated April 1949.
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