13 
GEOLOGY, Etc. 
PAGE 
Davison, E. H . — Primary Zones of Cornish Lodes 220 
Parsons, L. M. — Dolomitization in Carboniferous Limestone 220 
Rawlins, F. I. G . — Interference Fringes and Focal Length of Objectives 220 
Hilton, H . — Determination of Optic Axes from Extinction Angles 221 
METALLOGRAPHY, Etc. 
Hughes, W, E. — Electro-deposited Iron and Effeci of Acid 221 
Smithells, C. J., & others — High Temperature Phenomena of Tungsten Filaments 221 
Cook, M. — Recrystallization of Cu-Zn Alpha Solid Solution 221 
Belaiew, N. T. — Inner Structure of Pearlite Grain 221 
Austin, C. R. — Hydrogen Decarbonization of Carbon Steels 222 
Carpenter, H. C. H., & C. F. Elam — Effect of Oxidizing Gases at Low Pressures 
on Heated Iron 222 
Hallimond, A. F. — Delayed Crystallization in Carbon Steels 222 
Ehn, E. W. — Dissolved Oxides in Steel 222 
Whiteley, J. H. — Formation of Globular Pearlite 222 
ULTRAMICROSCOPY, COLLOIDS, Etc. 
Knapp, L. V Solubility of Small Particles and Stability of Colloids 223 
Oden, Sven — Clays as Disperse Systems 223 
Mellor, J. W . — Plasticity of Clays 223 
NOTICES OF NEW BOOKS. 
Coles, Alfred C . — Critical Microscopy 224 
Penard, Dr. E. — Etudes sur les Infusoires d’eau Douce 225 
Lorrain- Smith, Annie — A Handboolc of the British Lichens 225 
Lang, W. D. — Catalogue of ' the Fossil Bryozoa ( PoTyzoa ), in the Department of 
Geology, British Museum 225 
Dixon, Henry H. — Practical Plant Biology 225 
Dowdy, S. E. — The Microscope 225 
Heath, Chart.es E . — The Beginner's Guide to the Microscope 226 
Sanderson, A. R., & H. Sutcliffe — Brown Bast 226 
Janet, Charles — Considerations sur V Etre Vivant 226 
Institute of Physics — Journal of Scientific Instruments 226 
liiBRAiRiE Chapelot — Revue d’optique ThCorique et Instrumental 226 
Watts, W. W. — The Geological Work of Charles Lapworth 226 
Cushman, Joseph A . — Foraminifera of the Philippine and Adjacent Seas .. .. 226 
Smithsonian Institute — A Monograph of the Existing Crinoids 226 
Cross, M. I., & Martin J. Cole — Modern Microscopy 226 
Kofoid, Charles Atwood, & Olive Swezy — The Free-living Unarmoured Dino- 
flagellata 226 
Schmitt, Waldo L . — The Marine Decapod Crustacea of California 226 
Ferris, Gordon Floyd — Contributions toward a Monograph of the Sucking Lice.. 226 
