VIII. MEASUREMENTS. 293 



can be brought to move in various planes, and the altered action of the force 

 measured by observation of the vibrations. 



1459a. Current Measurer, with arrangement for measuring 

 very strong electric currents. Baur and Haebe, Stuttgart. 



1460. Edelmann's Mirror-galvanometer for absolute 

 measurements. M. Th. Edelmann, Munich. 



1461. Large Wiedemann's Galvanometer. 



M. Th. Edelmann, Munich. 



1462. Small Wiedemann's Galvanometer. 



M. Th. Edelmann, Munich. 



1463. Edelmann's Compensation-galvanometer. 



M. Th. Edelmann, Munich. 



1464. Edelmann's Lecture-galvanometer. 



M. Th. Edelmann, Munich. 



1465. Edelmann's Small Mirror-galvanometer. 



M. Th. Edelmann, Munich. 



1466. Edelmann's Pocket Compasses, with absolute 

 measurements for electro-therapeutics. 



M. Th. Edelmann, Munich. 



1467. Du Bois Raymond's Astatic Magnet. 



M. Th. Edelmann, Munich. 



1468. Ordinary Compensator. 



M. Th. Edelmann, Munich. 



1469. Edelmann's Induction Galvanoscope. 



M. Th. Edelmann, Munich^ 



1470. Large Galvanometer for Electro-therapeutic 

 Purposes. M. Th. Edelmann, Munich. 



1471. Differential Galvanometer, very delicate, with two 

 coils. (Becker, London.) H. Lloyd, Trinity College, Dublin. 



1472. Electro-Dynamometer. Apparatus to determine the 

 strength of electric currents by measuring the action between 

 different parts of the current itself. 



H. Lloyd, Trinity College, Dublin. 



1473. Apparatus for covering wire with silk for electric 

 purposes. H. Lloyd, Trinity College, Dublin. 



1474. Apparatus to illustrate some of the laws of electrical 

 rotation of Faraday and Ampere. Yeates fy Sons. 



1475. Tangent Galvanometer. James How fy Co. 



