LIST OF PLATES. 
To face page. 
XI-IV. Lincoln, on Electrical Conductivity, . . 427 
V. Lincoln, on Electrical Conductivity, . . 429 
VI. Lincoln, on Electrical Conductivity, . . 437 
VII. Lincoln, on Electrical Conductivity, . . 441 
VI1I-IX. Harper, on Nuclear Phenomena, . . . 498 
X-XI. Chandler, on Inter-generation Period, . 500-502 
XII-XIII. Marsh, on Epischurci Lacustris , Forbes 549 
