Show tile sound of thunder ri miny portions all indistinct idea of caused tile sound of thunder hit to tn it us follows ollowa Thoo tim rigia of tile tho gaiu ill culled ci iBis lo io im be look isokait oili lot for in ilio ilia install dunoon canoom i mid and violent dilation tit u tin tile air along tile hie track ot at tho the lightning flash partly no doubt line to the disruptive of electricity of 0 which I 1 have al ready ant ill mainly due to the tha iva cifu of which ilio ilia nir for a moment BO at bril illicitly incandescent there in la thus all 0 trai atily sudden compression of tile tho 1 air I ir ill all ilia truck of ilia spark spurla unit unil 11 less lab sudden lint but atilt rapid limit of tile tho air into tile partial vacuum which it produced thus the boned bavo pro tinned at t first bu be ut of the tha natilio of it lorn boto or breaker but as such u state ot of motion ia alter ling 11 moderato distance ilia sound bound analogous analu gous to other loud land but lose loan via vio lent lant abounds much as those of thodis tho ilia charge of guns gund there low lew bloods were acro the air of a nearly uniform dou dorrity Rity anil and the ilia flash a short one this von 11 completely describe the phonon phot ioia aboul huou a and nd we wa should havu have a u chander clap according to the grouter greater or 01 less IBBS ot of tho the last ECU of discharge hat but us line long beon been well veil known not merely clouds but entrance at deputation or ol ot of air ot of density doua ity snob oil im Donst oon stanlly Antly in thunder storms at ornis vibrations in thel the air and thus wo we may have many successive prolonging the original sound lint bat there is ia another cause olton often mora efficient than those theao when the flash is ia n long ono all its parts martn being nearly tul istatt from the tha observer he hours t abo 0 gonad bonnil from all parts parta simultaneous I 1 IT but betit it its ita furta la be ut at very did arent from him lio he board successive ly the ills bounds from portions oaB further and further farther distant from him liviu if the 11 uh be much zig haggod long portions of its course may ran at one buu anil and tin the same gamo distance from him and the sounds from me is arrive simultaneously at ills his ear this extreme distance at which thunder Is ia heard is ig not great when whan wo we consider the frequent groat great intensity of the sound bound no trustworthy observation ou gives in general moru more than about nine bine or ten tea miles inilla though there are cases in which it is poo that it may have been board ettril li fourteen miles off buethe bat tha discharge of a cannon is ii alto aicard at fifty miles anil and the tha loiso of a siege or naval has certainly boon been heard at it a distance dia tance of much more than lanin ono one hundred miles |