t h e spectra of alcoholic solutiolis of t h e ethyl esters of dibetizoyl succinic acid. T h e results are in liarmony with the theoretical views of Knorr. It was possible to follow t h e gradual cliange of t h e enol form into t h e keto esters. TV. D. 6. T h e curves of t h e molecular vibrations of benzantialdoxime and benzsynaldoxime. 11’. i X r , Har-fley nrid f . J . DoDliic. J O I L ~ .Cherri. SOL.7 7 , 5 0 9 (1900). TI’. 11. n. -’The two fornis of hetizaldosixt~egive ideiitical spectra.
A study of the absorption spectra of o-oxycarbanil and its alkyl derivatives in relation to tautomerism. 11’. A? Hizrtlej,, f . f . Dolibie, and P.G. Pn’nlinfr-ens. foiri.. Clievc, SOC. 77, 839 (1900). -It appears that o-osycarbanil is chiefly t h e 1v. u. 0. lactarii form in solution. Ultra-violet absorption spectra of some closed chain carbon compounds, 11. 11’. -V. Hnrfley arid f . f . Do66ie. foirr-. Cherii. Sac. 77, 846 ( z ~ o o ) . - T l i e snbstances stndied were diiiietliylpyrnzine, liesanietliylene, and tetraliydrobeiizerie. T h e band of diinetliylpyrazine is both wider and more persistent tli,in t h a t of pyridiiie. T h e spectrum of the other two substances confirm tlie view t h a t “ t h e bauded spectruni is sliown only by substaiices whicli possess tlie true TI’. 13. B. benzenoid structure.” T h e transparency of aluminum for the radium radiation. Z3. f’?ecqziere!. Coiiififes reridics, 130, z154 (1900). -The autlior has arranged things so t h a t rays, passing through aluminuril and itnpiiiging o n at] opaque object, cast a s l ~ a d o wwhicli can be deflected by a magnet, while tlie source of t h e liglit is evidently the radium and not t h e nlutnitlum. 11T.D. 0. T h e transmission of radium radiation through substances. I-(. h’eqztcrel. 130, 979 ( 1900) - Experiments are described to sliow that. when a fluorescent scree11 is held very near a iadio-active substance, some of t h e rays actually pass tlirougli t h e screen. 1v.n.n.
Cuiiifitcs 1-enillis,
On the reflection and refraction of cathode rays and of the deflectable radium rays. P. P’iUitrd. Coinfifes m i d i i s , 130, 1010 (1900).-Experiments to show that most of the rays passing tlirougli or reflected from other substances are due to a secondary emission. 117. u. 12. On t h e property of certain substances in losing their phosphorescence on heating a n d regaining it on cooling. G. Le Bun. Coiitptes i w ~ d u s ,130, S9r (1900). - Tliree samples of bariuni bromirle contailling radio-active matter were found to lose their power of emitting liglit when heated t o 2ooc arid to regain i t on cooliug. T h e author the11 erperiniented wit11 other substances mid found t h a t qniniiie sulphate does tlie same thing. 111this particnlar case, t h e pllenoinenon is apparently connected witli t h e Iiydratiou and dehydration of the salt. 117. D.o.
Fluorescence of certain metallic compounds under t h e influence of Rantgen and Becquerel rays. P Bmy. Cumfifes reirdrrs, 130, 776 (1900). - T h e autlior has determilied which salts of the alkaline tiietals aiid of t h e alkaline e a r t h becoine fluorescent when exposed t o the RGtitgen arid Becquerel rays. K i t h o u t esception, the clilorides are fluorescent. TI/.n.n.
