PACIFK ' KWTHLY. 



And 



the heat which our earth re- 

 in the sun i- only aa one to 

 .khhhmi. Whew e come* to th.- 

 ■uo the supply for all this 



iii diameter,) and i 

 its win. I.- outer surface with a layer ol 

 IT mil< h thick ; and the burning 

 pf all this coal would supply the sun 

 with heat only one y«-;tr. Whence 

 comes so much coal every year'.' And 



extravagant ofita heat ever since the 



in began ; and if the Nebu- 



[yphothesia is even substantially 



indefinitely earlier then 



the earlii si geologic time Bui 



the human race is especially concerned 



with the future supply ; for if t ti >• sun 



-hull have i" pi n :i littleecon- 



omy it may In- hard for the children of 



in. ii Meteor* may possible give a 



partial supply. Stopping the earth in 



■it would prnduco as much beat 



. burning fourteen world 



and if the earth should fall to 



.:> produced would equal 



thai >al ; and 



this would keep up the sun's heal 



i, if -.li.-n. onci in 822 j • 

 ■ world as beavj aa oon should fall to 



in from our distan 

 miles, the supply would be furnished ; 

 or. if u corresponding number of 

 smaller m in our w. - 



ug sky there is .1 f:iint briglil 

 called the "zodiacal light," some ■ 



• wide at the base and reaching al- 



te senith, which may l»- the 



ii.,n of thi 1 [lit from ■ bell 



of meteoric ma • ■und 



ill'- Min ; and some have though) that 



by falling to the sun mighi 

 up its supply of heal Bui "revolving 

 around" ia not "failing to;" and 



though some might fall, as to th* 

 earth, yet, Since our great met* 

 shower of 1833 did not perceptibly 

 our temperature, we must look 

 for sonn" mora promising soun 



Supply. Beside^, all meteoric matter 



must he exhausted in the • 

 time, even if the sun is traveling 

 through a universe full of it. in 

 the universe is absolutely infinite in 

 extent. Then from the utter failure 

 uf every effort to find an adequate 

 supply fur the sun'a heat, lei us lit 

 to the firm voice of analogy from the 

 Nebular Hyp 



teni has been gradually cooling since 

 before the ti r »t planet, Neptune. 

 thrown off. Our human race, with its 

 history of an hour, came intoexistence 

 at tin I cooling proci - j ; and 



We and our children and your chil- 

 s children to thousands of gener- 

 ations may live and enjoy before the 

 sun is perceptibly cooler Hut modern 

 ii tends no more strongly to any 

 conclusion than thai the sun roust 



sto|. shining, stop warming. The clock 

 must run down and Stop, and Byron's 

 tin of Darkness." be realised, un- 

 less some hand, outside the clock, 

 shall wind it. Hut if the sun mut 

 out in tim ■■. it begs 1 its shining in 

 time, just aa a clock, which cannot 

 run forever, has not been riming for- 



iie.1 men's id. 

 the duration oftime back enormously ; 

 and the Nebular Hypothesis taking on 

 more and more of the apnearani 

 truth, earned our ideas hack indefin- 

 further still. But whether our 

 clock is a day clock ..1 an eight-day 



clock, or a clock of a thousand J 

 orof a thousand million years; if it is 

 running down it has not been running 

 illy, or it would have run down 

 long ago, What must have an end. 



