SPONTANEOUS CRYSTALLISATION OF MONOCHLORACETIC ACID, ETC. 351 



Remarks. 



The index rose from 1-428224 at 70 to 1-437123 at 48-5. A dense shower of 

 a-crystals occurred at 48 -5, and the temperature rose to 60. No further 

 readings for the index were possible. 



The index rose from 1- 429183 at 57 -5 to 1-435050 at 44. A dense shower of 

 a-crystals occurred at 44, the temperature rising to 51 and the index falling. 



The index rose from 1- 427289 at 63 to 1-435148 at 43. A few a-crystals 

 appeared at 45 and a dense a-shower occurred at 43. The temperature rose to 

 48 and then fell again. At 47 the index had fallen to 1 431969. 



The index rose from 1-428092 at 60 to 1-434851 at 44. At 46 some a-crystals 

 were growing in the solution, and a shower occurred at 44. The temperature 

 rose to 46 -5 and the index fell to 1 -431275 at this temperature. 



The index rose from 1-425483 at 64 to 1-435838 at 38 '5. Some crystals 

 appeared in the solution at 40, and at 38 5 a dense a-shower occurred. The 

 temperature rose to 45 and the index fell to 1-43147 at this temperature, 

 corresponding to a point on the a-solubility curve. 



The index rose from 1-427891 at 57 to 1-435640 at 38. At 38 a dense 

 spontaneous shower of a-crystals occurred, the temperature rising to 44 with fall 

 of index. The temperature then fell again and the index continued to fall, 

 reaching 1-432068 at 41 -5. 



The index rose from 1 424783 at 57 to 1 435246 at 31 without crystals appearing. 

 At 31 a dense shower of a-crystals suddenly occurred, the temperature rising to 

 37 -5 with fall of index. The temperature then fell again and the index 

 continued to fall, reaching 1 429480 at 25 - 5. 



The index rose from 1-424583 at 57 -5 to 1-434753 at 33. At 33" a dense 

 a-shower occurred, the temperature rose to 37 -5 and the index fell. At 37 the 

 index was 1-431175. 



The index rose from 1-422675 at 56 to 1-435050 at 26. At 26 a very dense 

 a-shower occurred, causing a rise in temperature to 32 and fall in index to 

 1-430575. The temperature then fell again and the index continued to fall, 

 reaching 1- 429480 at 23. 



The index rose from 1-423981 at 50 to 1 -433359 at 27 without crystals appearing 

 in the solution. At 27 a dense shower of a-crystals occurred, the temperature 

 rising to 31 '5 and the index falling suddenly to 1-430377. The temperature 

 then fell again and the index continued to fall more slowly, reaching 1-427590 

 at 17. From 29 to 17 the index-temperature curve practically coincides with 

 the a-solubility curve. 



The index rose from 1-423579 at 47 -5 to T 432666 at 24. No crystals appeared 

 till at 23 a dense shower of a-crystals occurred and the temperature rose to 39. 

 No further readings for the index were possible owing to the density of the 

 shower. 



The index rose from 1-419860 at 54 to 1-433160 at 21-5. At 21-5 a dense 

 shower of a-crystals occurred, the temperature rose to 27 and the index fell 

 rapidly to 1-429580, a point almost coincident with the a-solubility curve. The 

 temperature then fell again, the index continuing to fall so that the index- 

 temperature curve from 27 to 18 is practically coincident with the a-solubility 

 curve. 



