/ 
4 
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_ Report OF Scrimne ee 4 
solvent; - 
over, by scission, 
Ivar an Semen. 
bodies is due to reactions between solvent and dissolved Baye for wae “changes 
alteration of the rotation is a particularly sensitive indicator. ai: ie + : 
The cryaseaple constant of fenchone amounts to 68 and -is nase saul 
with that of camphor (490). The latent heat of fusion is calculated therefrom to ben 
22.86 calories. According to the generalized rule of rote the ey heat be. : 
accord with the constant 73 calculated from the Value found ‘frorh the’ ‘raising oF 
boiling _point. ‘ The molecular depression of the congealing point of the alcohols 
fenchone is- already, in low concentrations, somewhat below the normal value | 
decreases still more the higher the concentration rises. With the phenols, the: 
cular depression is abnormally low in low concentrations, with increasing cc { 
the| value increases likewise. Acids behave in this respect like the alcohols, 
exception of salicylic acid, which reacts in this regard as a phenol. “eae 
The depression of the congealing point was determined for camphene, c é 
thujone, ethyl acetate, methyl salicylate, benzyl alcohol, benzaldehyde, anisic ald 
and a number of other bodies in which we are not interested. LJ cay Aa i 
from camphor by means of its. semicarbazone. 
the constants of the fenchone thus ieee 
be expressed by means of the dishersion formula: — a= 
several other bodies show complex rotatory dispersion. __ 
, x : + ay ion : 
EN Gazz. chim. ital. 49 (1917), Il. 87 A Chem. Zentralbl. 1918, H. 121, ; 
(LOND) | SOQ 3 eh , . Mirae Buca eR ade et pe 
