Published papers whose appeal lies in their subject-matter rather than their technical statistical contents. Medical, social, educational, legal, demographic and governmental issues are of particular concern.

Published papers whose appeal lies in their subject-matter rather than their technical statistical contents. Medical, social, educational, legal,demographic and governmental issues are of particular concern.

Reprint of the original, first published in 1866.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

Published papers whose appeal lies in their subject-matter rather than their technical statistical contents. Medical, social, educational, legal,demographic and governmental issues are of particular concern.