Tribune Lrtras Lecture and Letter Scries. 



ated and life no longer exist* upon tlioni. Of the five 



'1- .1 round tin- sun two arc ton muril In- il-'-i an 1 two 

 in- tuo rnld. Uh.v should We insist Upoll |-i gardini: the 

 {:< -'lit time as that to which our iv 

 ing should iipidyt It M, of course, tin- 

 treat linn- for ourselves, I, ut It Is not necessarih 

 specln> linn- to which our reasoning should 



applv. \V-- .-In-ill I regard the past lime \vln-n Mars W08 



Inhabited or tbe future time when Vi mis and Mercurv 



Mill In- the abodi : ' . Then- i- no special rca-on for 

 'ding t!.i- present time, any more tlian ai-.v man has 

 la regarding Ills own time as m ce-s.irdy tin- mo.- 1 im- 

 liortant BO fur as tlie earth Is concerned. So the exi-:- 

 i net- of tl.i- caiV.i is tin- most important time !<ir Hi- 

 Inhabitants of It, and there Is an end of the matter. It 

 VIT, ihe most important time for other 

 worlds, aud we have no reason for taking this time as 

 the p. -p r liii.i-in \\liiihtosny that this or that orb 

 ni'.-t t -c inliai.ited at tin- pre-t-nt time. 



N. .. v. will ] 'he curious family of planets 



wii-h tr.ivi l.s lietwei-n Mars and Jupiter. n.ere>ou 

 l.i\.-,in ihi- ;i -t pieiure, tho scale on which ti 



funned Pallos, Juno, Vesta, and Cen-s. 

 The \\ li- I in i-^ of tlie.-.- planets combined is very much 

 . U , remain to bo discovered, and 

 thus -,\i- n i I'lrnize a schi me of millions of orbs. If I hey 

 follow tbe -.line law as i In- other planets, then, being 

 )i .-mailer than the eartb on which we live, it must 

 l.av.- 1 ei u \ i r\ 1, MII: ago when they possessed inherent 

 heat i-:.. i ._;, in lie the abode of life. They must have had 

 it bi. - -.10! i time, as they would bavo parted with it 



very quickly. Thus wo have presented for coutempla- 

 ti< n the siraiiLir f.ict that millions of millions of years 

 a^" the-.- i l.uiets were the abodes of life, each for its 

 own lire. pei I. 



I ~ Men-, indeed, a waste I Are we to regard those 

 little i rl>- as Indicative of an enormous waste in nature? 

 W.i- 1 to the law of nature. Wo judge of 



e.nisc all our ideas are limited, so far as time 



and apace an- concerned. But we cannot apply our 



ld> a iv, and where there Is nn infinity of matter 



an i .'.! cm hardly pay there is a waste. Sup- 



i l..mdnd \, n-.s, or a thousand, or a year 



i, or a few days only, to bo the time 



during \\ i'-:i li:,. hus lasted on those small 



t !i in MILTS to our knowledge tho fact that of 



tin- niiiniii-r . f - els f.illinir from a tree perhaps only 



; In many years often may produce a tree. 



8 r ' us waste. The Idea of waste is continually 



ie us. 80 it is wltb tbe planets of the solar 



ve measure them by liuuinn analogy there 



i"- an immense wi.stc, but as there is au infinity 



of time and -pare, tlicro can be no waste. 



Ai.il i" :, re u,- pass from these smaller planets I would 

 remiml vim .: ..n- great wlgn of waste In our own earl h. 



'i'hi i\ |. i l Inhabited IH tlic surface. All th-- ci'-nh-al 



'"' ' waste. BO far as we apply our mode of 



D < nt. -o long as we regard human life as the 



; lest ni i ie of the Almighty. When wo cou- 



: thai i 111 -i iron- number of millions of cubic miles of 



m. iter whi'-h la-, i- iio l:\nicerciitiiresexistinirwiihin 



them, \\e are amaze, | at the apjia i.-iitly enormous waste. 



Only a thin eiu-t i,f the , .irth n iuhajiited. 



II , lellire.s nf the pl.im-l, -llggestilliJ curioilrt 



thought- as to iio'.v iheee planets may pass- eaob other 



with.nl, - e, and, (In refn re. during tho long 



uh, n th'i e 1 1 la net- \\r r, Hi,- al'odes of life, the 

 UviUfC creatures UDOD them might h ,\ e i xr hai.C' d Ideas 

 v.-ith tne creatures of Other planet-, lhat traveled mll- 

 llous nod n.ililoua of uilleb away from tlioiu. 



THE GREATER 



\Ve will now pa.-s t<i Jupiter and Saturn. TV> .invo the 

 clearest p,, -slide evidence that then- planets are not tbe 

 ai'n !es of life. I showed you how that tiriv sun poured 

 mi Jupiter. Here is Jupiter mark* d in tins strange, way. 

 Here are trreat Mn-aks showinc signs of great disturb- 

 ances talcing place in those belts. This slantin:: streak 

 shows .-urns of great forces being at work; 

 this streak which had, be it remembered, 

 an enormous surface for you must keep in 

 mind that when you are dealing with Jupltor 

 you nre deali'ig w'!b a planet whose diameter is ten 

 times that of tin- earth. Tin- \\holesurraco of the eartb 

 would not :( moie than this ]>oition of the belt which I 

 now indicate; and a surface equal, probably, to the 

 w ,'t ! of our (eminent v. as perceptible in an opening 

 through which the dark srrtare below could bo seen. 

 Now tins streak changed from Its present p"-i'i >n until 

 it was slanted rurbt across one of these belts, nnd cor- 

 responded to the motion in t!:at atmosidiore at the nito 

 of 200 miles ]n-r hour. That motion continued upwards of 

 six w eek.s, and we must accept the inference w li at a (Teat 

 hurricane was blov/ini:, shifting tins erear open space In 

 the cloud layer gradually, so lar jis the facts are con- 

 cerned, but shifting it with enormous rapidity, so far aa 

 the planet itself is concerned. That is a <li-i urbance 

 which, if It toolr place upon our earth, would sweep life 

 away. It was not merely the streak that was dis- 

 turbed, but tho whole surrounding mat dr. Tho 

 whoin of that region was swept by a tre- 

 mendous storm blowing at a rate twice aa 

 great as all the storms on the eartb competent to de- 

 stroy the buildings and the ships, and to tear down the 

 forests. It went on blowing, not as our hurricanes do, 

 with a certain obedience to the sun. We know our hur- 

 ricanes jrain and lose force with a cuange corrc-pondinjj 

 to the progress of the day. Hut here was a d'M'i ix-nce in- 

 deed. Jt was carried around and around for six weeks 

 without showing tho slightest effects of the sun's Influr 



enee. 



It seems manifest, then, that in tho case of Jupiter we 

 have a planet full of inherent energy, competent to load 

 its atiim-phero with enormous cloud masses. We find 

 th.it the shape of tho planet changes so that the planet is 

 -omeiimes drawn inward in siica a w.iy that tho satel- 

 lite passes across t lie pUiui't, an 1 i3 in ten minutes out- 

 side tho planet, a- it tlu> planet had sbruniz in. So hero 

 is an atmosphere so den> that tho d iisity would bo 

 greater Ulan that of the hea\ n-st metal-, and we know 

 ii,-veithele.ss the true weight of J.ipiter, and we know Its 

 density Is only one-tourth that of the eanh. Wa 

 find in JupKcr the same reason for a small density aa 

 in the earth, or in oilier \vr Is a great, heat. That 

 great planet th<- lirs t suU-niiiiato airirregatiou in the 



solar system, and containing ro matter than all the 



other planets put together must m the first processes 

 of its construction have engendered an enormous heat, 

 and that u ould not pass away so quickly as that of tiio 

 earth, and the planet would remain much mor,- healed 

 Hi in th!, > cart u ; and doubtless, we .still see in the planet 

 a condition w;:eiv life is utter'y impossible. 



PO -nni.rrv or j.iri'. <>\ .11 rirr.u'.- SAIT.I.I.ITES. 



But 1 told you we loiuid .-la-iu to suppose that till 



planets around Jupiter are the abodes of life, we llnd 

 those satellites bare a Harface iar_e enough to euublo 



them to lie lit abodes for li\ ing creatures. 

 Tl:>- lar_,e-t one of them i- larger t hail tho moon, and 



the others are^abouc the same size. \v.- tin i in deiimg 



with them tho same fact lh.il we loiind in t lie moon, 



that, being smaller bodies, the in at would pass rapidly 



