CONTENTS. 



Chapter I. Page. 



The cells and the manometer attachments 3 



Treatment of the clays 6 



First process 7 



Second process 7 



The formation of the cylinders 8 



The cutting of the cells 11 



The burning and glazing of the cells 12 



The manometer attachments of the cells 17 



Chapter II. 



The manometers 27 



Purification of the mercury 28 



Calibration of the manometers 28 



First method 29 



Second method 30 



The meniscus 33 



The uncalibrated portions of the manometers 37 



Capillary depression 39 



The filling of the manometer 45 



Determination of the volume of the nitrogen 48 



Chapter III. 



The regulation of temperature 51 



Thermometer effects 51 



The scheme for electrical regulation 57 



The battery 59 



The thermostat 59 



The master relay 61 



The minor relay 61 



The bath for 0° 62 



Baths for maintenance of temperature above zero 63 



Type 1 65 



Type II 66 



Type III 68 



Type IV 71 



Chapter IV. 



The membranes 77 



The deposition of the membrane 82 



Observations on the membrane 85 



Temperature of deposition 85 



Treatment of the cell while in use 86 



The soaking of the cell 87 



Activity of the membrane 88 



Deterioration of the membrane 91 



Effect of the electrolytes 92 



Semipermeability of membranes 92 



Removal of the membrane 93 



Infection of the membrane 94 



Chapter V. 



The weight-normal system for solutions 97 



Chapter VI. 



Cane sugar Ill 



Preliminary determinations of osmotic pressure Ill 



Series 1 112 



Series II 118 



Series III 128 



Series IV 132 



Series V 135 



Series VI 139 



Series VII 140 



Series VIII 142 



in 



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