PLATES. 



I. Illustrative of Mr. J. LeConte's Paper on the Apparent At- 

 tractions and .Repulsions of Small Floating Bodies. 



II. Illustrative of Mr. W. Baily's Paper on the Spectra formed by 

 Curved Diffraction-gratings. 



III. Illustrative of Mr. S. P. Langley's Paper on the Selective Absorp- 



tion of Solar Energy. 



IV. Illustrative of Mr. J. T. Piley's Paper on Capillary Phenomena. 



V. Illustrative of Mr. A. M. Worthington's Paper on the Horizontal 

 Motion of Floating Bodies under the Action of Capillary Forces . 



VI. Illustrative of Mr. L. Wright's Paper on Optical Combinations 

 of Crystalline Films. 



VII. Illustrative of Mr. J. Rand Capron's Paper on the Auroral Beam 

 of November 17, 1882. 



Vm. & IX. Illustrative of Professors Ayrton and Perry's Paper on wind- 

 ing Electromagnets. 



