Muscular Tissue of Pecten irradians. 29 
barium hydroxide, a heavy white precipitate was obtained, solu- 
ble in water, insoluble in baryta water and alcohol. This precipi- 
tate was dissolved in water, the baryta removed by a little 
dilute sulphuric acid in the cold and then reprecipitated by an 
excess of alcohol. 
Prepared thus, it seemed to have lost the property of becom- 
ing gummy so readily as before, and on examination was found 
to be completely free from albuminous matters, giving no reac- 
tion even with Millon’s reagent and also contained only 0°61 per 
cent of ash. The substance dried at 100° C. gave by analysis 
the following result, agreeing closely with that of the preced- 
ing preparation dried at the same temperature : 
es 3. 
Cc 43°93 43°91 
H 6°45 6°40 
O 49°62 49°69 
Another sample, prepared in the same way and dried be- 
tween 110°-120° C., gave: 
i 2. 
C 43°56 43°63 
H 6°71 6°71 
0 49°73 49°66 
_ Casting a backward glance, we see that the analysis of the 
air-dried substance corresponds with the formula C,H,,0,, 
1 0 dC,H,,0,. But there- 
sults obtained by the analyses of the substance dried at 100° 
36 62 : 
and that after exposure to a temperature of 140 C., when the 
i. 2 
Cc 43°58 43-85 
6°86 6°58 
vere *ttrixe mur néheren Kenntniss der Stirke Gruppe. Dr. Walter Nageli. 
