314 Dr. A. von Planta and Mr. W. Wallace on Apiine. 



sive. In some of its properties it resembles pectine, but it also 

 differs from that substance in many essential particulars. It 

 seems to be peculiar to the umbelliferous tribe of plants. Bra- 

 connot states that he has found small quantities of apiine in the 

 leaves and stalks of celery, and also in chenil. We have not 

 yet had an opportunity of examining other plants for this sub- 

 stance, but shall probably do so at a futui-e period. 



Before going more minutely into its properties, it will be well 

 to consider its composition. 



III. Composition. 



In the thi-ee following analyses, each was made upon a sepa- 

 rate quantity of apiine prepared at different times, and by a 

 slightly modified process. That employed in the third analysis 

 was prepared exactly as above described. No preference is given 

 to this analysis over the others, as the apiine in each case seemed 

 equally pure, the process described above being only the quickest 

 and most convenient. 



The ashes or inorganic matters of the three preparations were 

 respectively 0'36 to 0'62, and 0"15 per cent. In each analysis 

 the quantity of ash was deducted fi-om the actual weight. 



1. "3308 gnn. gave "1665 grm. water, and '6705 gi'm.carb. acid. 



2. -2855 ... -1410 ... -5764 



3. -3325 ... -1673 ... -6650 



These numbers give on calculation the following composition : — 



I. II. III. Mean! 



Carbon . 55-25 5505 54-55 54-95 



Hydrogen 559 5-49 5-60 556 



Oxygen . 39-16 39-46 39-85 3949 



100-00 10000 100-00 10000 



The composition of a quantity of apiine dissolved in caustic 

 potash and subsequently precipitated by an acid, may also be 

 given here, as its properties do not seem to be at all altered by 

 this treatment. 



4. 0214 grm. gave 0-1105 gi-m. water, and 0-4305 gi-m. car- 

 bonic acid ; or in 100 j^arts : — 



Carbon . . . 54-87 

 Hydi'ogen . . 5-74 

 Oxygen . . . 3939 



100-00 



It may be as well for us to state here, that all the combustions 



mentioned in this paper were made ^\nth chromate of lead ; and 



when the per-centage amount of carbon was high, pure oxygen 



gas was passed through the apparatus at the end of the process. 



