Category: Science - Biology
Causes of Variation § 1. Climatal causes generally (whether dependent upon latitude or upon altitude) § 2. Temporary heat or cold, of an unusual degree § 3. Nature of the country, and of the soil § 4. Isolation; and exposure to a stormy atmosphere
"It is not impossible," says a writer of the last century, "that such laws of Nature, and such a series of causes and effects, may have been originally designed, that not only g...
8. CHAPTER V.We frequently hear it asserted, that, since the members of the Insecta are so numerous and minute, when compared with those of other departments of the organic world, the entomo...
10. CHAPTER VII.Having now completed the short task which I had undertaken to perform, I will, in conclusion, offer a few brief comments on the results at which we have arrived, and endeavour t...
9. CHAPTER VI.How glorious to the observant eye is the great system of the organic world, how perfect in each separate part, how complete and harmonious the whole! The unity of the comprehens...
7. CHAPTER IV.Having in the preceding chapter briefly alluded to some of the principal causes by which the outward aspect of the insect tribes would seem to be in a large measure (though with...
5. CHAPTER II.It is scarcely possible to survey the members of the external world around us without being struck with the instability with which everything is impressed. The very shadows, as...
4. CHAPTER I.A very small amount of information gained by the student in the field of Nature is sufficient to kindle the desire to increase it. The more we know, the more we are anxious to k...
2. CHAPTER III.Causes of Variation § 1. Climatal causes generally (whether dependent upon latitude or upon altitude) § 2. Temporary heat or cold, of an unusual degree § 3. Nature of the countr...
1. CHAPTER II.3. CHAPTER VII.