iMiAcric Ai. LAWS oi' IJI-1-: 



:i:n 



leani the laws iiiidcr wliidi wc lixc mav ainoiuii lo ciiiiiiiial 

 carelessness. Wv, discoxrr ami Icani laws in (udcr thai we 

 may be able l<> obey thciiu thai is, brini^r nwy \\\cs into har- 

 mony with tluiii. (harlcs Darwin, by litdonL,^ application 

 and saciilicc, niaikccl the L;rcatest advance in discoNciy of 

 tht! laws ol lite that the world has known. These are not 

 far-awav abstractions of thonirlit, and not him'- can bo of more 

 intense practical valne than a knowled^^e of them. Work 

 done or life lived in accordance with them is always etVective 

 and successfnl, while that done (n- 

 lived in ()p[)osition t(» thcni is 

 always fntilc. 



While it may be snihcienL that 

 a few specialists learn how to 

 control the chemical and i)h3^sical 

 forces of nature in accordance witli 

 the laws of physics and chemistry, 

 the forces of living nature are so 

 numerous, affect tlie lives of all 

 alike so intimately, and are so 

 powerful that common welfare re- 

 quires of every member of a civi- 

 lized community that he know enough about them to do 

 his part. 



Law of geometrical increase. A// HviiKj iliimis frii</ f<> in- 

 erenae In geometrical r<(ti>. 'i'his is the })roblcni of the hniner 

 who promised to pav the blacksmith one kernel of wheat for 

 the first nail in his horse's hoofs, two for the second, bmr lor 

 the third, and so on. The sixty-fourth nail al(»nc would cost 

 him 6,141, 4r)l,r)r)(;,():i-2 bushels of wheat — more than the en- 

 tire wheat crop of tin- world for 1^<M)() years. The farmer did 

 not know the law of gi-ometrical inci'case when he j)romised 

 to ])av the wheat. Millions of "farmers'" who do not know 

 this law are promising t<t pay, in contiol of insects or fungi 



Fni. 103. Diauram slinwiiiglive 

 generations (loublin^ by geo- 

 metrical pr()gre.s.si«>n 



