Chapter 5.1-5.11

Chapter Ⅴ: Laws Of Variation
5.1  ---- 00:00
5.2 Effects Of The Increased Use And Disuse Of Parts, As Controlled By Natural Selection ---- 05:45
5.3 Acclimatisation ---- 19:35
5.4 Correlated Variation ---- 27:51
5.5 Compensation And Economy Of Growth ---- 36:35
5.6 Multiple, Rudimentary, And Lowly-Organised Structures Are Variable ---- 40:47
5.7 A Part Developed In Any Species In An Extraordinary Degree Or Manner, In Comparison With The Same Part  In Allied Species, Tends To Be Highly Variable ---- 43:03
5.8 Specific Characters More Variable Than Generic Characters ---- 52:29
5.9 Secondary Sexual Characters Variable ---- 57:04
5.10 Distinct Species Present Analogous Variations, So That A Variety Of One Species Often Assumes A Character Proper To An Allied Species, Or Reverts To Some Of The Characters Of An Early Progenitor ---- 62:35
5.11 Summary ---- 82:50