98 H. G. SMITH. 



limb a little longer than the other, and the end of the longer limb 

 closed. A small portion of eudesmol was then melted in the closed 

 end and the remainder filled with mercury; this was attached to 

 a thermometer and the whole immersed in glycerol. On heating 

 it was found that slight decomposition commenced at about 180° C. 

 and continued to slowly increase until 250° C. had been reached, 

 when the determination was stopped. No alteration, therefore, 

 takes place at 150° C, and eudesmol sublimes readily below that 

 temperature. 



Rotation. 

 Eudesmol has no rotation ; 2*5 grams dissolved in 50 grams of 

 alcohol had no action on a ray of polarised light in a 200 mm. tube. 



Analysis of Eudesmol. 



The material was melted in the platinum boat at the lowest 

 possible temperature. Results of five of the determinations made 

 are given — 



01725 gave 0-5006 C0 2 and 0-1764 H 2 0. C. 

 0-2324 „ 0-6704 „ „ 0-2294 „ 

 0-1962 „ 0-5646 „ „ 0-1951 „ 

 0-1611 „ 0-4657 „ „ 0-1622 „ 

 01608 „ 0-4624 „ „ 0-1614 „ 



C 10 H 1G O requires 78*94 C, and 10*53 H. per cent. 



Mean of the above analyses = 78*7 and H= 11*14 per cent. 



The material used for determinations Nos. 4 and 5 was that 

 previously used for the molecular determination ; it was regener- 

 ated from the acetic acid solution by the addition of water. 



Molecular determination. 

 The molecular determination was made by the cryoscopic method 

 glacial acetic acid being used. 



Eudesmol taken = 0-3855 gram. 



Acid =29 grams. 

 Acid alone, first time freezing = 5 - 56° 

 „ ,, second ,, „ = 5-54° 



third „ ., f= 5-53° 



. = 79-13; H = 



= 11-36 



„ 78-66; „ 



10-97 



,, 78-44; „ 



11-06 



,, 78-83; „ 



11-17 



„ 78-42; „ 



11-15 



