IV. MAGNETISATION. 245 



artificial magnet here exhibited has lately been re-magnetized, with a slight 

 modification of his method by Prof. Van der Willigen in the Teyler Museum, 

 by this ring with the current of forty Bunsen elements of the usual large 

 size. 



1128. Apparatus for showing to an audience the effects of 

 the superficial tension of liquids (Tomlinson's Cohesion Figures) ; 

 Magnetic Curves or the movement of liquid films, &c. 



Prof. W. F. Barrett. 



1129. One Bar of Metallic Nickel, 20 inches long and 

 \ inch diameter. George Gore, F.R.S. 



1130. Three Plates of Metallic Nickel, 6 inches long and 

 1J inch wide. George Gore, F.R.S. 



1131. One Small Nickel Horseshoe, for making a Nickel 

 Magnet. George Gore, F.R.S. 



1132. One Plate of Metallic Cobalt, 6 inches long and 

 1^ inch wide. George Gore, F.R.S. 



1135. Horse-Shoe Magnet of Nickel, used by Sir William 

 Thomson in his experiment on the effect of magnetism on the 

 thermo-electric quality of nickel. Result published in the Trans- 

 actions of the Royal Society for the year 1856, Bakerian Lecture. 



Edinburgh Museum of Science and Art. 



1136. Apparatus for showing a series of molecular and mag- 

 netic changes in a red-hot iron bar ; and designed also to show 

 the influence of traction, compression, and torsion upon such 

 changes. The latter experiments have not yet been made with it. 



George Gore, F.R.S. 

 See Philosophical Magazine, Sept. 1870. 



1136a. Apparatus for exhibiting molecular changes occur- 

 ring during the heating and cooling of iron wire. 



Prof. W. F. Barrett. 



1136b. Apparatus designed by Gr. Gore, F.R.S., for exhi- 

 biting the effects of stress upon the magnetisation of iron. 



Prof. W. F. Barrett. 



1136c. Gore's Apparatus for exhibiting the torsion of an 

 iron wire produced by axial and transverse magnetisation. 



Prof. W. F. Barrett. 



1136d. Class Apparatus for exhibiting the elongation of 

 unstrained iron produced by magnetisation. Prof. W. F. Barrett. 



1137. Coulomb's Torsion Balance for magnetic and electric 

 observations. . Warnwrunn, Quilitz, and Co., Berlin. 



