September 27, 1901.] 



SCIENCE. 



489 



the basic properties predominate. So 

 marked are its basic properties that it com- 

 bines with nearly all the common acids 

 and even with the aldehydes forming pe- 

 culiar para derivatives. 



Monocblorcamphor oxime CioHjjClNOH. 



Until recently no real halogen derivatives 

 of camphor oxime have been made. Free 

 chlorine acts upon it, but forms, instead of 

 a chloi-ide, the common hydrochloride and 

 the nitrile. However, if the oxime is dis- 

 solved in ether and treated with sulphur 

 dichloride, the monochloride is formed di- 

 rectly in almost pure state. 



Monobromcamphor oxime CjoHuRrNOH. 



The same difficulty in introducing chlo- 

 rine was experienced in making the bromine 

 compounds. It was finally made by treat- 

 ing a chloroform solution of the oxime in the 

 dark with bromine and allowing to stand 

 until the bromine color had disappeared. 

 The pure substance is inactive toward polar- 

 ized light, has a specified gravity of 1.48 

 and an index of refraction of 1.557535 at 

 15° C. 



Dibromcamphor oxime CioH^^BrjNOH. 



By treating a boiling dilute alcoholic so- 

 lution of champhor oxime with bromine in 

 excess an oily substance settles "to the bot- 

 tom. The substance was removed, purified 

 and analj'^zed. The results correspond to 

 the above formula. 



Numerous attempts were made to sub- 

 stitute the chlorine and bromine, but as yet 

 results are unsatisfactory. No proof has 

 likewise been obtained of the position in 

 which the halogens enter. 



22. 'A Chemical Study of the Seed of 

 Rhus glabra ' : G. B. Frankforter and A. 

 W. Martin. 



The seed of the Rhus glabra or common 

 sumach has been examined, but almost 

 wholly with the idea of determining the 

 amount of tannic acid. In the present 

 paper we have made, so far as possible, an 



exhaustive examination with special refer- 

 ence to the oils and to the cholesterol 

 present. 



We began by studying the seed and husk 

 together, but soon found it advisable to sepa- 

 rate them, as most of the oil exists in the 

 seed and all the tannic acid in the husk. 

 The seed contains 9.1 per cent, of oil, while 

 the husk contains 2.5 per cent. On the 

 contrary, the husk contains 7.32 per cent, 

 of tannic acid and 1.35 of malic acid, while 

 the seed contains none. 



An examination of the oils showed that 

 the one obtained from the seed resembled 

 that from the husk, the chief difference 

 being in the quantity of foreign substance 

 present. The following is a brief compari- 

 son of the properties : 



Seed Oil. Husk Oil. 

 Sp. gr. at 15°C. .923 .933 



Index of Refraction at 15°C. 1.48228 1.48764 



Saponification Value 194.7 190.1 



Iodine Value 86.4 87.2 



Drying Properties None None 



Color Light yellow Dark brown 



An examination of both the oils showed 

 the presence of a substance resembling 

 cholesterol. It was obtained by the com- 

 mon method for the extraction of choles- 

 terol. It is probable that the substance 

 obtained in each oil is the same. That ob- 

 tained from the seed oil was so small that 

 it was not studied. The husk oil contained 

 2.26 per cent. It was readily removed 

 from the oil by acetone. The substance 

 was carefully purified and analyzed. 

 Analysis gave numbers corresponding with 



the formula 



CsoHj.OH. 



The molecular weight determination gave 



numbers agreeing with the above formula. 



23. ' Phenoxozone Derivatives ' : H. W. 



HiLLYER. 



As indicated in the paper read at the 

 meeting of the Association in New York, 

 when picryl chloride acts on pyrocatechin 

 in presence of two molecules of alkali, one 



