Knowledge for the People; Or, The Plain why and Because: Familiarizing Subjects of Useful Curiosity and Amusing Research, 第 2 卷

amphibia animals aphides appear become bees beetle belly birds birds of prey blood Blumenbach body bones breed called caterpillar cetacea claws colour covered creature cuckoo cuttle-fish devour eels eggs elephant enabled feathers feed feet female fins fish flies fluid frogs furnished gills hair head hippopotamus hive horns horny horse hyæna insects jaws larva larvæ legs length light Linnæus live male mandibles mastication matter membrane migrations mole moth motion mouth muscles muscular natural naturalists neck nest observed organs owls pectoral fins peculiar perfect placed possess prey produced pupa quadrupeds remarkable reptiles resemble respiration rivers says season serpents serve sharks shell silk silkworm skin snails snakes sometimes spawn species spiders stomach substance summer supposed surface swallow swimming tail teeth temperature tion torpid trees tribe vegetable weight whale whip-poor-will whole wild wings winter worms young