0.496 ete et ight 
The Ponstatiis for the. activity of the non-ionized 1 molecules 
ethylate, K,, amounted to 0.478, a value Neaniy. pail to that of the ef 
lithium ethylate, 0.496. | Rhee, Are 
Bred piuely shaken Loe olive oil shows on eeintnasiod in the ultramicroscope 
mobile particles; when, however, Ol. camph. is shaken with water, numerous 1 
‘microscopical particles consisting of camphor are observable in the water. 
In order to ascertain the amount of camphor passing as colloid into the aquec 
solution on shaking Ol. camph. with salt solution, 500 cc. salt solution of 0.75 per c 
strength (“sérum artificiel”) was left for 48 hours at 37° in contact occasional skaki 
with 50. cc. Ol. camph. (dis0 0.921) containing for each 9 g. of olive oil 1 g. camph 
After 24 hours clearing, 336 cc. of the aqueous Jayer were extracted with 2 cc. benze 
The latter showed in a 20-cm. tube a dextrorotation of 43 minutes, pe 
an amount of 0.335 g. camphor in 500 cc. salt solution. 
It may be expected that after hypodermic injections of Ol. camph. camphor passes : 
over into the blood in the colloidal state, and the authors are of opinion that the thera: a- 
peutical effect of the remedy is mostly due to this physical ‘phenomenon, | 
bs 
a 
Rue 
“i. 
e. 
The physical properties of some absolutely pure esters of aliphatic ‘aie have ‘been n 
determined by J. H. Matthews and K. E. Faville”). The esters, obtained from Kahlbaur n, 
were purified according to Young and Thomas’ directions’), consisting in the main. in 
removing the free acids by shaking with aqueous potassium carbonate and extract 
the remaining water and alcohol by treatment with dehydrated potassium carbon 
and phosphorus pentoxide, after which the ester is fractionated carennny: ic consta 
determined by Matthews and Faville are as follows: — © 
\ 
.o 
B. p. at 760 mm. . doe. ‘Np 
Isoamyl formiate . . . 123.46 to 123.56° 0.8773 1.39772 7 am 
Isobutyl formiate . . . 9815 , 98.259 0.8832 1.38568 = | 
Propyl acetate... . . 101,57 4, 101.77° 0.8869 1.384223) ae 
Ethyl propionate . . . 99.12 , 99.229 0.8904 138414 — 
Propyl propionate. . . 121.0 ,, 121.25° . 0.8809 1.39325 — 
Ethyl butyrate . . <.. 120.0. ,..1205°° / *QB784: «14000 tae 
fap valerianate . . 167.0 ,, 1685° 0.8544 1s 2 
12) Compt. rend. 164 (1917), 648. — *) Journ. physical. Chem. 22 (918), 15 Journ. hem, 
1.153. — #) Zbidem 63 (1893), 1191. — 4) Rev. gén. de Chim. 19 ee 68. ' 
‘ 
