CONTENTS. XXIX 



I'AGB 



Wright, F. E. — New Half-shade Apparatus with Variable Sensibility 182 



„ Determination of the Relative Refringence of Mineral Grains under 



the Petrographic Microscope (Fig. ID) 182 



Gordon, J. W. — Theory of Diffraction in Relation to the Theory of Optic* . . .. 513 

 Wright, F. E. — Accurate Measurement of the Refractive Indices of Minute Crystal 



Grains under the Petrographic Microscope 514 



(6) Miscellaneous. 



Batsch's " Test acea Arenulas" 1791 71 



Scunkiderhohn, H. — Apparatus and Practical Methods for the Microscopical 



Examination of Crystalline Bodies 71 



Bibliography 185 



Beale, W. P. — An Amateur's Introduction to Crystallography .. 302 



Ptrsson, L. V. — Microscopical Cliaracters of Volcanic Tuffs: a Study for Students 620 



B. Technique. 



CD Collecting: Objects, including- Culture Processes. 



Barber. M. A. — Pipette Method in the Isolation of Single Micro-organisms 



(Figs. 6-9) 71 



Cromwell, B. C. — Diagnosis of Asiatic Cholera 76 



Schill & K. Ujihara — Studies in Amoebic Dysentery 185 



Schmidt. G. — Simple Cultural Method of Distinguishing Diphtheria from Pseudo- 

 Diphtheria Bacilli 186 



Smyth, H. F. — New Medium for the Cultivation of Chick Tissues in Vitro .. .. 186 



Menzies, J. A. — Preparation of Haematin 186 



Petroff. S. A. — Cultivation of Tubercle Bacilli from Sputum and Fasces .. . . 187 

 Danysz. J., & Z. Skrzynski — Immunization of Rodents against Naturally Pathogenic 



Paratyphoid Organisms 188 



Richet, — Adaptation of Lactose Fermenting Organisms to the Medium in which 



they are grown 188 



Cheyne, W. W. — Testing Antiseptics .. .. 189 



Hall, J. Walker — Purification of Silk Pepton for Bacteriological Purposes .. . . 191 



Hiltox, A. E. — Cultivation of Plasmodia of Bodhamia TJtricularis (Fig. 20) .. .. 191 



Banta, A. M.— New Collecting Tube (Fig. 21) 192 



Minchin, E. A., & J. D. Thomson — Demonstrating the Development of Trypanosoma 



lewisi in the Rat-flea 192 



Mchlens — Detection of Trypanosomes in Animals 302 



Dreyer, &., & others — Detection and Identification of Bacillus typhosus and 



B. paratyphosus 302 



Laidlaw, P. P. — Some Simple Anaerobic, Methods 304 



Meek. C. F. V. — Studying the Mitotic Spindle in the Spermatocytes of Forficula 



auricularia 306 



Stassano, H. — New Method of Sterilizing Bacterial Cultures 407 



Parhon, C. J., & E. Savini — Thyroid and Supra-renal Glands as Bacterid Culture 



Media 408 



Lentz, O.. & H. Yiolle — Culture Media for the Isolation of Cholera 515 



Bottomley, "W. B. — Bacterial Test for Plant Food Accessories (Auximones) .. 620 



