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Page 660 of 699
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Maker
Hilger & Watts Ltd
Title
Precision photogrammetric plotting machine
Description
The pamphlet gives advance information on this new instrument. in four paragraphs The first paragraph defines the instrument’s aims and uses; the second concentrates on user requirements; the third is a remark on its physical properties; the last provides specifications
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Maker
Davis
Title
Davis’s “Chronometer” Tables
Description
Tables giving hour angles which represent local apparent time for exact degrees of altitude, latitude and declination of the sun.
The hour angle must be corrected for the effect of neglected mintutes in every hour in order to obtain an accurate apparent time.
Document contains:
- Preface: notes previous attempts to create such a table by M. Hommey in 1863, Jerome Lalande in 1793, and Thomas Lynn in 1827. Also notes that the method loses its accuracy in higher latitudes, and that the table is not intended to solve spherical triangles but to provide a quick and easy way of finding longitude at sea with sufficient accuracy for practical purposes.
- Explanation and use: explains how to use the tables and correct them for neglected minutes. An example of a calculation is given.
- Tables for all latitudes.
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Maker
Cambridge Instrument Company
Title
Instructions for the Operation and Care of Cambridge Electro-Cardiographs by The Cambridge Instrument Company
Description
Item of sales literature bound within black hardback volume: ‘CAMBRIDGE INSTRUMENT CO. CATALOGUES 926-934’
Shelfmark
Maker
Cambridge Instrument Company
Title
Instructions for the Use and Care of the Cambridge Versatile Galvanometer and Accessories by The Cambridge Instrument Company
Description
Item of sales literature bound within black hardback volume: ‘CAMBRIDGE INSTRUMENT CO. CATALOGUES 926-934’
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Maker
A. S. Aloe & Co.
Title
Reduced Prices. A. S. Aloe & Co. (Successors to Aloe, Hernstein & Co.), Manufacturers and Importers of Surgical, Optical & Electrical Instruments.
Description
A revised price sheet to accompany the catalogue of January 1882, with a list of new inventions on the last page.
List of prices of instruments in 1882 catalogue, showing the page no., article no., price in catalogue of 1882, and corrected price. Instruments listed are a wide variety of surgical equipment.
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Maker
Maud Antoinette Duthoit
Title
No. 7264 A.D. 1914: Improvements in or relating to Orreries, Telluria and the like
Description
Patent record, including provisional and complete specification. Heading: ‘No. 7264’, Stamp of Her Majesty’s Government, ‘A.D. 1914’.
‘Date of application, 23rd March, 1914.
Complete specification left, 23rd Sept, 1914 -- Accepted, 18th Mar, 1915.’
Provisional specification: Declaration by Maud Antoinette Duthoit concerning the purpose and feature of the invention.
‘The object of the present invention is the construction of an orrery and tellurion or the like which, while suited for individual use or for class instruction, and correctly planned from a scientific standpoint, is nevertheless simple, cheap, compact and readily portable’.
The orrery or tellurium is attached to a removable pillar forming the centre about which the earth turns, which is designed to project upwards from an astronomical chart.
A complete specification gives more details of the instrument.
A fold-out illustration of the instrument is provided, dimensions 330 x 297 mm.
The Chartered Patent Agents submitting the application are: Boult, Wade & Tennant, 111 & 112, Hatton Garden, London EC.
Printed for his Majesty’s Stationery Office by Love & Malcomson, Ltd. - 1915
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Maker
J. Newman
Title
A Catalogue of Philosophical Instruments, Manufactured and Sold by J. Newman
Description
List of instruments, with prices, under the following headings:
‘Philosophical Chemistry’
‘Electricity’
‘Voltaic Electricity’
‘Magnetism’
‘Pneumatics’
‘Mechanics’
‘Barometers, Thermometers &c’
Shelfmark
Maker
Edwards Vacuum Components
Title
Vacuum Switch Model VSK1B (Code No. D059-08-000)
Description
Information is presented under these headings:-
Data and Specification; Description; Installation;
Operation; Spares List
Text is accompanied by diagrams.
Shelfmark
Maker
Hilger & Watts Ltd.
Title
Folding mirror-stereoscope with parallax-measuring device
Description
Information is presented under these headings:- Features: Stereoscope, Binocular unit, Parallax-measuring device, Advantages of the device are, Parallel-guidance device; Preliminary Specification; Catalogue Numbers For Ordering SB 180-185
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Maker
British Scientific Instrument Research Assoc.
Title
The measurement of relative humidity by an electrical method utilising adsorption in ceramic elements: Progress report.
Description
This interim research report of the British Scientific Instrument Research Association summarizes the results so far of an investigation into determining relative humidity by measuring the adsorption of water vapour in porous ceramic elements, with a brief description of the apparatus constructed for producing atmospheres of known humidity.
Information is presented under these headings:- Introduction; Apparatus for Producing Atmospheres of Various Humidities; Selection of Porous Ceramic Bodies; Measurement of Electrical Resistance of Elements; General Form of Response Curves; Mechanism of Conduction; Effect of Sodium Chloride in the Elements; Effect of Applied Voltage; Rate of Response to Humidity Changes; Long-Term Variations in Element Resistance; Effect of Temperature; Heat of Adsorption; Effect of Carbon Dioxide; References; [diagrams].
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