PLATES. 



I. & II. Illustrative of H. Nagaoka's Paper on the Hysteresis attending 

 the Change of Length by Magnetization in Nickel and Iron. 



III. & IV. Illustrative of Mr. J. Daniel's Paper on the Polarization 

 upon a Thin Metal Partition in a Voltameter. 



V.-IX. Illustrative of Prof. Langley's Paper on the Internal Work of 

 the Wind. 



X. & XI. Illustrative of Mr. Rimmgton's Paper on the Behaviour of an 

 Air-Core Transformer when the Frequency is below a certain 

 Critical Value. 



