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The Kelvin electrostatic voltmeters of various types and the current balances of Messrs. Kelvin and White remain the standard instruments for alternating current. Messrs. Gambrell Bros, show a series of simple laboratory galvanometers and special cable-testing switches. Messrs. Nalder Bros, and Thompson show their portable electrostatic apparatus for measuring insulation resistance and a selection of switchboard and other instruments. The Morgan Crucible Co. exhibit a variety of carbon brushes for electrical machinery.

Messrs. Kelvin and White also show modern examples of the mariner’s compass and apparatus for sounding, which may be used without diminishing the speed of the vessel; for the perfection of which, and the resulting benefits to mankind, so much is owed to Kelvin’s genius.

Messrs. Negretti and Zambra show a representative selection of meteorological and other apparatus,' including deep-sea thermometers, and Messrs. Darton and Messrs. Pillischer have a similar exhibit.

A very complete series of apparatus for oculists is shown by Messrs. Gowlland and of surgical instruments by Messrs. Down Bros.

Apparatus for draughtsmen and curves cut to conic sections and other forms are exhibited by Messrs. W. J. Brooks & Co.

Messrs. Cussons exhibit a large number of models of machinery and models illustrating kinematic principles.

The Reflector Syndicate show a series of metallic mirrors of various sizes for searchlights and similar purposes, the perfection of form being assured by their being deposited, on a temporary glass mould of the required curvature.

The exhibit of the Synchronome Co. takes the useful form of an electrical time service, a number of dials, driven by an electrically operated master clock, being distributed throughout the British Section.

It is hoped that the exhibition of Mr. Dunscombe’s historical collection of spectacles, &c. will contribute to its enlargement.

The references to literature dealing with many of the more special instruments exhibited will be of considerable value.

Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,80 %.

La langue de reconnaissance de l'OCR est l'Anglais.