298 Sdentific Intelligence. 



filled with fused calcium chloride, tlic antozone disappears; while 

 ozone passed through such a tube is uuatieited. But it the gas 

 from the ozonizing tube be passed dircrtly thi-ough this calcium 

 chloride tube, then through potassium iodide solution and then 

 through water, the cloud appeais with fiill strength. Engler and 

 Nasse hence infer that the antozone is formed when the ozone is 

 destroyed in presence of water ; and only then. Whence they 

 conclude with v. Babo and Weltzien, that antozone is only hydro- 

 gen peroxide. In support of this view they give the followiDg 

 experiments: (1.) The stream of electrized oxygen, deozomzed by 

 a solution of potassium iodide, was passed through a spiral tube 

 1-5 meters long, and found to give the mist on passing through 

 water. This spiral was then heated in a zinc chloride bath; as 

 the temperature rose, the mist formed became less and less, disap- 

 pearing completely at 170°, and returning again as the tube cooled. 

 (2.) The stream of deozonized oxygen was passed through a ^non 

 tube containing fragments of potassium hydrate, and then througn 

 four narrow tubes 60 centimeters long filled with gkss-fragments 

 but its mist-forming power was hardly weakened ; when these tuD^ 

 were cooled to -20°, however, no mist appeared o^ PJ^'''| " 

 through water ; and when two narrower and empty tut)es 

 used, and the stream of gas continued for 24 hours, water conden^eu 

 in them whic-li eave th? rcnctions of hv^— — 'ula In eon- 



available for the 



of technical 



the refraction and dispersion of light * or P«»T<'«f particD" 

 metallochromy, the new colors of percobaltic bydwce ^ (ion 

 larlyto be noted, on account of the facility ^^ ^^f ^ e W^^ 

 and their permanence. (4.) All of these compounds • |tate 

 only with a weak current. If it be too strong, ^ll\^^^^i}^ 

 ^Sn Z-H^h^llf I'^T^nt '.'iv V '"MHdv irevSvS>^^J 



talUc ptn-hv>Trat^^—,/. ///. CI, . II, ii, ii'S ''^■'■- '''''"" 



