Of these three essential factors, space might be said to be one with which biogeography is primarily concerned. However space necessarily interplays… — Leon Croizat Copy Share Image
Let us suppose that we have laid on the table... [a] piece of glass... and let us homologize this glass to a whole order… — Leon Croizat Copy Share Image
Of these three essential factors, space might be said to be one with which biogeography is primarily concerned. However space necessarily interplays with time… — Leon Croizat Copy Share Image
![“Let us suppose that we have laid on the table... [a] piece of glass... and let us homologize this glass to a whole order of plants or birds. Let us hit this glass a blow in such a manner as but to crack it up. The sectors circumscribed by cracks following the first blow may here be understood to…” quote by Leon Croizat](https://sms4smile.com/quotes/img-quotes/75f/leon-croizat-94198_bird_let-us-suppose-that-we-have-laid-on-the_1001009.jpg)