Category: Science - Biology
The lovers of minute anatomy have always been specially attracted to Insects; and it is not hard to tell why. No other animals, perhaps, exhibit so complex an organisation condensed into so small a body. We possess, accordingly, a remarkable succession of memoirs on the struct...
When the skin of an Insect is boiled successively in acids, alkalies, alcohol, and ether, an insoluble residue known as Chitin (C_{15}H_{26}N_{2}O_{10}) is obtained. It may be r...
8. CHAPTER VIII.A very long chapter might be written upon the views advanced by different writers as to the circulation of Insects. Malpighi first discovered the heart or dorsal vessel in the y...
10. CHAPTER X.The development of the Cockroach is by no means an easy study. It costs some pains to find an accessible place in which the females regularly lay their eggs, and the opaque caps...
6. CHAPTER VI.The nervous system of the Cockroach comprises ganglia and connectives,[100] which extend throughout the body. We have first, a supra-œsophageal ganglion, or brain, a sub-œsophag...
11. CHAPTER XI.Like all useful scavengers, the Cockroach is looked upon nowadays as an unmitigated pest. It has, however, a certain right to our regard, for it comes of a venerable antiquity....
7. CHAPTER VII.PLATEAU. Recherches sur les Phénomènes de la Digestion chez les Insectes. Mem. de l’Acad. Roy. de Belgique, Tom. XLI. (1874). [Now the principal authority on the Digestion of In...
5. CHAPTER V.The muscles of the Cockroach, when quite fresh, appear semi-transparent and colourless. If subjected to pressure or strain they are found to be extremely tender. Alcohol hardens...
3. CHAPTER III.The common Cockroach is native to tropical Asia,[14] and long ago made its way by the old trade-routes to the Mediterranean countries. At the end of the sixteenth century it app...
9. CHAPTER IX.RAJEWSKY. Ueber die Geschlechtsorgane von Blatta orientalis, &c. Nachr. d. kais. Gesellsch. d. Moskauer Universität., Bd. XVI. (1875). [Testes of Cockroach. The original paper i...
1. CHAPTER I.The lovers of minute anatomy have always been specially attracted to Insects; and it is not hard to tell why. No other animals, perhaps, exhibit so complex an organisation conde...
2. CHAPTER II.The place of the Cockroach in the Animal Kingdom is illustrated by the above table. It belongs to the sub-kingdom Arthropoda, to the class Insecta, and to the order Orthoptera.