122 Dr.8.B.Schryver. Some Investigations Dealing [Aug. 12, 
phenylalanine and leucine, preferred to the Sorensen method, as the end 
point of titration is a certain pink colour, and not the first appearance of 
pink. Nevertheless, a series of solubility determinations carried out by this 
method in the case of leucine agreed well with the results obtained by the 
Kjeldahl inethod. 
The ammonia was distilled off through hard-glass well-cooled condensers, 
to avoid the action of the hot liquid on the glass. Sodium alizarine 
sulphonate was the indicator used for titration, and the ammonia present in 
the various reagents as an impurity was estimated and the necessary 
corrections made. It was only found in the sulphuric acid and lithium 
chloride, and the correction in each case was only a fraction of a cubic 
centimetre. 
Table II.—Solubility of Leucine and Phenylalanine. Temperature 23°°77+0°1 C. 
Leucine. | Phenylalanine. 
A. B. C. A. B. C. 
Relative Relative 
Mg. mol | Granimes| tuts, | ME- mol | Grammer tabity, 
2 aa *|H,0=100.|| P Bly as * |H,O=100. 
WVIGeY Meee eer setae eect tent. (eyal 9°57 100 -O 85 °2 14 06 100 ‘0 
Sodium chilomde™ 825...34......-. 63 °9 8°37 87 *4 726 11 ‘98 85 °2 
oo eDromude es...) cents 68 “9 9-03 94°3 83 °2 ES) 7/47 Cia 
WO i hithate ae te 68-9 9-03 94°3 86 “6 14-29 1016 
Ady PLOCIGLO Spans beeen aeeent G20 9 °52 99 °4, 93 °4 15°41 109 *6 
»  sulphocyanide ......... 78 °2 10°24 106 °9 99 -9 16 °48 117 °3 
Se AE ORIMALG . ke eeeee tees 65 ‘1 8°53 SOCOM nee dod 2 -49 88 ‘8 
Dee 1 MBC LOLS  cctAme pret one ner oie 53 ‘9 7°06 73 °4 | 658°6 9°67 68 ‘8 
ae ACCLALC si. 2k eee tre 576 7°55 78 °8 66 °9 11-04 78 °5 
»,  monochloracetate .... 61°4 | 8:04 84:0 | 74°6 12°31 87 °5 
» wdichloracetate 22... 62 °5 8°19 85 °5 | 80°0 13 20 93 °9 
»,  trichloracetate ......... 66 °2 8 67 DORGy Iii = S66 14 °29 101 ‘6 
pe DeENZOabe eco.) ee eee 68 °3 8 94 93°4 || 96:1 15 ‘86 112°8 
yy nsalicylate si. icc 81°3 10 °65 111 °2 120 °8 19°93 141 °7 
J) pulpliate. .ssscosee.- 59 °3 777 81:1 69 “4 11°45 81 “4 
wy venalonate ©. a..tsae. es 60 0 7 86 82 °1 70°6 11 °65 82 °8 
Ny) a SUCCINAbE ..0 essere tee 57 °7 7°56 78 °9 69 ‘1 11°40 81:1 
Ak. “bAELTALO dca eccieecena seh 57 °2 7°49 78 °2 65 °2 10 :96 76 °5 
Pt Scitrnte) £1 tt ies Mamet! 61-2 8 -02 83-7 72°6 11-99 85 °3 
re chiloride.!).aaese.ee 63 °9 8°37 87 °4 726 11°98 85 *2 
athium’.. .; 6 poe 69-2 9 -06 94.°6 81 °4 13 53 95 °5 
IRotassiuim *", ye seem te 65 *4 8°57 89°5 77 °5 12 ‘79 90 ‘9 
Maonesinm 5 Waeeeees ses as-0s. 81 ‘6 10 ‘69 111 °6 94 °3 15 °56 110 6 
cai fs ee 87 *4 11-49 119 ‘5 106 °2 17 52 1246 
Strontiuna syclMees be Lhe 83 ‘0 10 ‘87 1135 96 “5 15 92 113 °3 
Barium Ryn GA beapec etn 78 °8 10 °32 107 ‘8 97 °8 16 14 114 °7 
Cerium whines i) easter Aare 164 ‘6 21 °56 225 °1 175 °0 28 ‘87 205 *& 
