INDEX. 367 



from disorders : smallest changes in man make great altera- 

 tions in this sense : antipathies to animals whose presence 

 is perceived by the smell, ii. 47. Delicacy of smelling in 

 birds instanced in ducks, iv. 9. 

 Smile, Fielding asserts, a person with a steady glavering smile 



never failed to prove himself a rogue, i. 422. 

 Snail, shell of the garden-snail, in what manner formed, v. 



201. 



Snail (sea), a cartilaginous fish, described, v. 107. 

 Snail (garden), is surprisingly fitted for the life it is to live: 

 organs of life it possesses in common with animals ; and 

 what peculiar to itself: every snail at once male and 

 female, and while it impregnates another, is impregnated 

 in turn : coupling of these animals : hide their eggs in great 

 numbers in the earth, with great solicitude and industry : 

 the growth of them : possessed of the power of mending 

 the shell, and, come to full growth, they cannot make a 

 new one: Swammerdam's experiment to this purpose: 

 their food: salt destroys them: so does soot: a tortoise in 

 a garden banishes them most effectually : continue in a 

 torpid state during the severity of winter: so great their 

 multiplication in some years, that gardeners imagine they 

 burst from the earth : wet seasons favourable to their pro- 

 duction : sea snail, fresh-water snail, and land snail: com- 

 mon garden-snail compared with the fresh-water snail, and 

 sea snail : fresh-water snails viviparous: bring forth young 

 alive, with shells upon their backs : experiment made by 

 Swammerdam to this purpose: at all times uf the year, 

 fresh-water snails opened, are pregnant with eggs, or with 

 living snails, or with both together : sea snails found vivi- 

 parous, others lay eggs : manner in which the sea snails 

 impregnate each other : different orifices or verges of snails : 

 the difference between land and sea snails : of the trochus 

 kind, have no mouth : their trunk : are among snails, as the 

 tiger, the eagle, or the shark, among beasts, birds, and 

 fishes : food of all sea snails lies at the bottom : of sea 

 snails, that most frequently swimming upon the surface, 

 whose shell is thinnest, and most easily pierced, is the 

 nautilus : its description : nothing seemingly more impossi- 

 ble, yet is more certain, than the nautilus sometimes quit- 

 ting its shell, and returning to it again: peculiarity by 

 which the nautilus is most distinguished, v. 213. 

 Snake continues for several months together subsisting upon 

 a single meal, ii. 3. Snakes destroy mice, iii. 181. The 

 only animal in the forest adventuring to oppose the mon- 

 key ; larger snakes often winding up the trees where they 

 reside, and happening to surprise them sleeping, swallow 

 them whole, before they have time to make defence, 305. 

 See Serpents. 



