INDEX OF SUBJECTS. 



373 



Types, mechanical, 165 



mixed, 221 etc. 



molecular, 165 etc. 

 Typical hydrogen, 259 etc. 

 Tyrosine, synthesis, 290 



T TMBELLIFERONE, 295 

 \J Unitary system, 162, 167 etc. 

 Unsaturated acids, 270 



compounds, 269 etc., 308 

 Uranium, atomic weight doubled, 



3U 



Urea, synthesis, 116, 288 

 Uric acid, n 



group, 354 



synthesis, 290 



VALENCY, 233, 240, 248, 250 

 etc., 254, 267, 288, 307 etc., 



325 



constant or variable, 307 etc. 

 Van der Waals's equation, 335 

 Vanilline, synthesis, 290, 355 

 Vapour densities, 105, 337 



densities, abnormal, 299 etc., 

 304 etc., 337 



Vapour densities, ratio of, 300 

 pressure, diminution, 336 

 Vapours, transpiration, 332 

 Vital force, 115 



WATER, composition, 22, 28 

 dissociation, 302, 305 



in combination, 90 



presence in oxygen acids 

 doubted, 158 etc. 



presence in many organic com- 

 pounds doubted, 180 



regarded "as type by William- 

 son, 209 



supposed conversion into earth, 

 22, 23 



V YLENE, 271, 275 



A 



ZINC ethyl, discovery, 227 

 vapour density, 299 

 Zymase, 349 



Printed at THE DARIEN PRESS, Edinburgh, 



