183 



Ph/e 



[ApnlS, 



of upeoil iatoesi. Professor Dewar ir«8 good esoo^ to famish 

 wiA a pne maple of this ga& The sounds produced bv it, 



g «p « M i p J to the intemiittent bemm, were verr pc^werfoL 

 Cbknde of mediy], » liquid whit^ boiis ai the oriinarv tem- 



renfeire of 



disjl*';^ 11 



♦V- = 



= nir. 



■igtit t- 

 erect, w.: 



tin ~ 



poured into a sntftll flask, and pennined to 



iL y.Tpncpd to Ihe intonnittent beam, its 



er that of maiBh-gaa. 



:rr of maok-gM being aboot half that of air, it 



.: the flask eontaining it, when left open and 



■" its contents. This, however, is not the 



— "' the filTn of this zas clinging to 



^ * le to produce aoonds of great 



the 1: 



_an qiBBthT 

 -k- the bfown ' 



Placed i^ 

 inced. Tl 



the ».-ii. 



\^ lirp. 



pUced 

 filled tiie cell 

 ■till ecntimed. F 

 die MBe liqir ' 

 off Oe b^r 



i.4.— l- 



lodiiie 



was 



It 

 bj ihe 

 tl 



To 



mAmticm. of al 

 Theve vac no - 



or iodine Tapcpu 



In tbe*^ f: 



tjer 



_ .^ being poured into a well- 



r rapiilj diffused itself in the air above 



intermittent beam, a somewhat forcible 



3eem to militate against my former 



r low absorptive power to bromine 



*5 were conducted wiih obscure 



I had to deal with the radia- 



"n part luminous. Now 



it to be an energetic 



. - . . :a, when suddenly con- 



■ai in the l ^ : the vapoir. I thought 



ir.g the bromine and the rotating disk I 



g'lAJ^ cell : the sounds contiaued. I then 



-t bisulphide of carbon: the sounds 



' hide I thtn subEtitated 



._ ■ -- .-1 ..-line. Thii solution cut 



*hr ravs of heat free trananiseion : the 



^mall flask yielded a forcible sound, 



y the interp<:'sition of transparent 



-tely quelled by the iodine 



Lave been loreseen that the rays trans- 



i would also be transmitted by its 



-e C'li^T-^rUrd into sound-* 



— -t: — While the flask containing the 



_• in the intermittent beam, a strong 



-^ between it and the rotating disk. 



A the sounds with either bromine 



Ts from the lime-light were converged 



g disk. In the next experiment 



. . lairror, and afterwards rendered 



I uj:^z.ilr.zjellj xjf: '-hi- p Lrs^^E^clogr. 



