226 



MR J. Y. BUCHANAN ON THE 



INDEX. 



Accessory weights, Increase of weight of hydro- 

 meter by means of ... . 21 

 Multiple observations by means of . . 27 



Preparation of 29 



Andrews, Reference to experiments made on the 

 critical temperature and pressure of 

 gases by ..... . 201 



Archimedes, Principles of 17 



Beryllium chloride, Comparison of specific 

 gravity and displacement of solutions 

 of 179-184 



Expansion on dilution of solutions, of low 



concentration, of . . . . . 182 



Specific gravity and displacement of solu- 

 tions of 179 



Calcium chloride, Comparison of specific gravity 



and displacement of solutions of . . 179 



Concentration of supersaturated solutions of 185 



Constitution of crystals of . . . . 189 



Eate of cooling of supersaturated solution of 187 



Remarkable state of unrest in a super- 

 saturated solution of . . . . 185-196 

 Tables of specific gravities of solutions of . 171, 



179, 190-192 

 Challenger, Hydrometer used on board the. . 20 



Laboratory on board the .... 24 



Concentration, Change of displacement pro- 

 duced in a solution by change of . . 116-131 

 Crystallisation, Analogy between formation of 



ice and 199 



Heat liberated during .... 188 



Remarkable state of unrest in a solution of 



calcium chloride preceding . . . 185-196 



Displacement, Difference of . . . 61-72, 102 

 Discussion on the values of increments of . 132-144 

 Hypotheses used in the discussion of the 



increments of .... . 108 



Increments of .... 102,10.5,135,139 



Mean increment of 105,139 



Statistics of solution 61-72 



Summary of iiiciement.s of . . . . 84-88 

 Sunmiary of mean increments of . . 89-93 



Values for difference between increment of 



di-splacement and difference of . 123-129,183 



Ennead, Tables giving relations of the molecular 



displacements of salts of the double . 219 



Table-s giving data relating to salts and 



mother-liquors of the double . . 210, 217 

 Exponents, Discussion of relation between . 113-1 16, 184 



Hydrometer, Accessory weights used at the top 



of the stem of .... . 21 

 Determination of true weight of . . . 32 

 Determination, in distilled water, of dis- 

 placement of 33-44 



Determination of specific gravity of solids 

 lighter and heavier than water by 



means of 17 



Example of degree of accuracy attainable 



by the use of 172 



Principle and construction of closed . . 26 



Principle and construction of open . . 155 



Study of mineral waters with . . . 19 



Use of accessory weights with ... 20 



Use on board the Challenger of the . . 20 



Hypotheses, Agreement of values of increments 



of displacement for a particular salt 



with one of two 108-116 



Ice, Analogy between the deposition of crystals 



from a solution, and the formation of . 197 

 Isomer, Discussion of displacement of solutions 



of the artificial 177 



Isomeric salts, Ditt'erences of displacement . 175 



Solubility of 174 



Specific gravity of solutions of . . . 173 



Use of the term 172 



Laboratory, Challenger ..... 24 



Control of room temperature in . . . 53 



Privacy of 24, 171 



Magnesium chloride, Behaviour of super- 

 saturated solution of . . . 178, 196 



Comparison of specific gravity and displace- 

 ment of solutions of ... . 179-184 



Specific gravity and displacement of sohi- 



tions of 1 79 



Thermal effects of the dissolution of crystals 



of 179 



Meniscus, Infiuence, on the determination of 



specific gravity, of ... . 46 



Mineral waters, Use of hydrometer in the study 



of 19 



Mother-liquors, Concentration of certain . 187, 207, 217 



Determination of the specific gravity of 



salts by displacement in their own . 202-219 



Discussion relative to 209, 218 



Numerical relation.s between crystallised 



salts and their 209, 218 



Specific gravity of ... . 187, 207, 217 



Tables of dispjlacements of . . . . 207, 216 



Observations, Scheme for logging . . .38, 167 



