348 QUESTIONS. 



said of the Gentoo nations ? of the inhabitants of Lapland ? of the 

 inhabitants of other countries in Europe and America ? What circum- 

 stances throw light upon the question whether Man was designed to 

 use animal food ? How should the proportion of animal and vegetable 

 food be determined ? In the selection of his food, what guides are 

 given to Man ? to other animals? (P. 146.) To what may the dis- 

 persion of animals over every portion of the globe be in a measure 

 attributed ? Give illustrations. What is said of Siberia and Kamts- 

 chatka? What is said of the great variety of plants, noxious and 

 others ? What was the experiment of Reaumur, in respect to the 

 Flesh-fly ? How did Redi show the rapidity of growth of some small 

 animals ? 



(P. 148.) What two theories have prevailed in respect to the process 

 of digestion ? What three classes of experiments on this subject did 

 Spallanzani make ? What were the first experiments with balls and tubes 

 filled with grain ? What was the result in the case of the Turkeys ? 

 Describe the experiments of the rough glass and leaden ball ; of the 

 ball and lancets. How did he prove that the stones usually found in 

 the gizzard are not essential to these effects ? 



(P. 150.) What were the experiments with Crows. Ravens, &c., and 

 their results ? What was the result of similar trials upon Man and 

 other animals with thin, membranous stomachs ? 



Why is there no danger to be apprehended from the accidental swal- 

 lowing of live insects and reptiles ? What extraordinary power in the 

 gastric juice of the Dog? What inference from the properties of the 

 gastric juice in Man, as to the food suitable for him? What facts are 

 stated in respect to the preservative power of the vital principle against 

 the effects of gastric juice ? What facts show the great power of the 

 gastric juice in Man ? 



CHAPTER VII. 



OP THE TRANSFORMATION OP ANIMALS. 



(P. 154.) What general observation is made on the transformation 

 of animals ? on the transformations of the human species ? What 

 changes in the mental developments and tastes ? What is said of the 

 transformation of Quadrupeds ? of Birds ? of Reptiles ? What fact 

 is stated in regard to the Rana paradoxa, and the Surinam Toad ? in 

 regard to the Serpents? the Crustaceous tribes ? What account is 

 given of the transformations of Insects ? What are the two most com- 

 mon transformations ? (P. 158.) Describe the process of moulting, or 

 easting the skin. How many times does the Silkworm change hie 



