1877.] 



On the Normal Paraffins, 



325 



Also that the origin of all strata in exhausted tubes is at the positive 

 pole. At certain pressures there is only one stratum, then, as the pres- 

 sure is diminished, two, three, and so on, each being added on from the 

 positive pole. "We succeed easily in obtaining photographs of the phe- 

 nomena, as the strata can generally be made to remain stationary for some 

 time. Several of the photographs are in the hands of the engraver to be 

 copied, and we hope to be able to show the history of several tubes in a 

 communication we are now drawing up. 



June 21, 1877. 



Sir JOSEPH HOOKER, C.B., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered for 

 them. 



The Eight Hon. John Duke Lord Coleridge and Dr. Thomas Eichard 

 Eraser were admitted into the Society. 



The President announced that Section V. Chapter III. of the Statutes, 

 under which a Eellow whose paper had been printed in the Philosophical 

 Transactions could claim to pay, in lieu of the annual contribution, a 

 Life Composition of £40 instead of £60, had been repealed by the 

 Council. 



The following Papers were read : — 



I. " On the Normal Paraffins/'' Part II. — By C. S. Schorlemmer, 

 E.R.S.., Professor of Organic Chemistry in Owens College, 

 Manchester. Received June 5, 1877. 



(Abstract.) 



In the first paper of this subject it was shown that by the action of 

 chlorine on a normal paraffin a primary chloride and a secondary one of 

 C H 1 



the general formula 11 g^ 1 j CHC1 are formed simultaneously*. It 



appeared of interest also to examine the action of bromine on the 

 paraffins. The present paper contains the first results of this research. 



I. Normal Hexane. — When bromine vapour is passed into the vapour 

 of the boiling hydrocarbon, in the daylight, its colour disappears quickly 

 and substitution products are formed which are partly decomposed by 

 distillation. The portion distilling without decomposition consists of a 



* Phil. Trans, vol, 162, part i. p. 111. 



