Die Johanniskäfer-Licht. Von H. Muraoka, Rigakiihakushi, Ph. D., Prof. page. 

 der Physik am Dai-San Kötö Gakkö 129 



On the Prediction of Solar Eclipses. By Shin Hirayama, Rigakushi, Pro- 

 fessor <>f Astronomy, Science College, Imperial University, Tokyo 141 



How Mercurous and Mercuric Salts change into each other. By 



Seihachi Hada, Rigakushi, College of Science, Imperial University ... 1G1 



ImidoSlllphonateS. {Second Paper) By Edward Divers, M.D., F.R.S., Prof., 

 and Tamemasa Haga, F.C.S., Rigakiihakushi, late Asst.-Prof., College of 

 Science, Imperial University 195 



AmidoSUlphonic acid. By Edward Divers, M.D., F.R.S , Prof., and Tame- 

 masa Haga, F.C.S. : Rigakiihakushi, late Asst.-Prof. College of Science, 

 Imperial University 219 



Molecular Conductivity of Amidosulphonic acid. By Jöji Sakurai, 

 !■'.('. s '.. Higakuhakiishi, Professor of Chemistry, College of Science, Im- 

 perial University 259 



The Physiological Action of Amidosulphonic acid. By Oscab Loew, 



Ph. />., Prof., College of Agriculture, Imperial University 273 



The Reduction of NitroSOSUlphateS. By Edward Divers, M.D., F.R.S., 

 Prof., and Tamemasa Haga, F.C.S. Rigakiihakushi, late Asst.-Prof. College 

 of Science, Imperial University 277 



Economic Preparation of Hydroxylamine Sulphate. By Edward 



Divers, M.IK, F.R.S., Prof., and Tamemasa Haga, F.Ü.S., Rigakiihakushi, 



late Asst.-Prof., College of Science, Imperial University 291 



On the Time-Lag in the Magnetisation of Iron. By Yoshuiro Katö, 



Rigakushi. (With Plate YIJ-XV j 295 



Pt. III. Published July 19th, 1893. 



Diffraction Phenomena in the Focal Plane of a Telescope with 

 Circular Aperture due to a Finite Source of Light. By 11. 



Nagaoka, Rigakiihakushi, Professor of Applied Mathematics, Imperial 



University, Tokyo (With Pia tes XYl-XVII.J 321 



Researches on Magnetostriction. By II. Nagaoka, Rigakiihakushi, Profes- 

 sor of Applied Mathematics, and K. Honda, Rigakushi, Post-graduate in 

 Physics (With Plates XVIII— XIX.) 353 



t'KI.VJ KD A 1 THF. TORY. -INS A I Si: K IKI'SH IK1-KWA1SHA, 



