228 



total aiiiomit of the absorbed bromine. The remaining (|iiaiitity gives 

 a measure of tlie degree of iinsaturalioii, aiui is expressed in percent- 

 ages of weight of tlie weighed qnantily. 



In every experiment 300 gr. of paraffin was taken, an eqnal 

 weigiit of stones being put in tiie antoclave to promote a thorough 

 mixing; the temperature was always 435°. Some of the results 

 obtained are lecorded in the table, and in fig. 2 an illustration is 

 given of the variation of the pressure in the course of exjieriments 

 33 and 34. Though in expeiiment 33 the typical pressure cnr\'e 

 according to Bf:RGius given in our preceding communication is not 

 obtained, probably on account of the high temperature, the difference 

 from the cracking-pressure curves is nevertheless very striking. In 

 all the other expei-iments recorded in the table the pressure cnrves 

 obtained are analogous to those of 33 and 34. The oils obtained 

 by the Buhgios' process were coloured from yellow to red, and 

 perfectly transparent, a small quantity of "carbon" was deposited on 

 the bottom. The oils obtained in cracking were very dark of colour 

 and pretty well opa(|ue. Here too separation of some carbon is found. 

 The small (piantiiy of carbon which is deposited on the bottom, 

 when the weight of carbon which had already been deposited on 

 the stones is added, is so small, both in the cracking and in the 

 Bkhgius' method, that practically the paraffin maij he assianed to 

 have been entirehj converted into oil and gas in both ])rocesses. 



In this we leave out of consideration experiments 35, 37, and 40, 

 where the duration of the processes was still so short that the 

 reaction product had remained partially solid. Hence the jirodiict 

 obtained had to lie melted out in these experiments. 



It ajtpears from the expei'iments inade that, 



1. ol)SBrvations can be obtained which can be perfectly rejirod need 

 (comjiare 35 and 37, and 46 and 48). 



2. if the duration of the experiments is long enough, the paraffin 

 is |)ractically quite converted inio li(|uid oil and gas, both in the 

 cracking and in the Bekgius' process. 



3. the yield of gasoline does not differ much in the two piocesses. 



4. there is a great difference in the nature of the residues left in 

 the distillation of the oil obtained according to Englkr. Its specific 

 gravity is always smaller in the Herginisation experiments than in 

 the corresponding ciacking expeiiments, which is a confirmation of 

 corresponding experiinents made by Bekgius. 



5. It appears from the final pressure, also in connection with the 

 gas analysis (percentage of hydrogen), that actually considerable 

 quantities of hydrogen are absorbed in the herginisation. 



