362 PEINCIPAL HENRY A. MIEKS AND MISS FLORENCE ISAAC ON THE 



1. Tubes giving a-showers. 



therefore passed somewhat into the labile region before crystallising, but this may be 

 due to insufficient friction within the tube. 



Experiment 50, with concentration 88'477 per cent., is anomalous, since this 

 solution becomes labile at 26 '5 ; yet it crystallised in the tube three times at 28'5 in 

 the metastable state. This is the only tube in the whole of this research which 

 behaves in this manner, and no explanation was found, unless it be that some error 

 may have occurred in weighing the acid and water contained in the tube. 



2. Tubes giving (3-showers. 



All these points, if plotted on the concentration-temperature diagram of fig. 6, will 

 be found to lie almost exactly on the ^-supersolubility curve plotted from the results 

 of the refractive index experiments. The tube experiments, therefore, completely 



