CONTENTS. ix 



PAGE 



season and climate — Built dwellings— Paper nests— Gelatine 

 nests — Constructions built of earth — Solitary masons — 

 Masons working in association— Individual skill and reflec- 

 tion — Dwellings built of hard materials united by mortar — 

 The dams of beavers. 



CHAPTER VII. 



The Defence and Sanitation of Dwellings ... 233 



General precautions against possible danger — Separation of 

 females while brooding — Hygienic measures of Bees- 

 Prudence of Bees — Fortifications of Bees — Precautions 

 against inquisitiveness — Lighting up the nests. 



CHAPTER VIII. 

 Conclusion 246, 



Degree of perfection in industry independent of zoological 

 superiority — Menial faculties of the lower animals of like 

 nature to Man's. 



Appendix ... ... ... ... ... ... 249 



Index 255 



