INDEX, J3j? 



MeJufa defcribed, loi. Its motions, 141. 



Memory of children is weak, and why, 203. 



Metamorphofes. See transformations. 



Migration of animals, 473. Lifts of birds of paffage, with the times of their arrival and 

 departure, 484, &c. Partial migrations, 491. Principal objefts of migration, 492, 

 503. Men have a principle of migration, 493. Quadrupeds likewife perform par- 

 tial migrations, 494. Migration of rats, ibid. ; of frogs, 495 ; of fiflies, ibid.; of 

 hnd-crabs, 5005 of infefts, 502. 



Millipes multiplies by fpontaneous reparation, 31. 



Mind. Its faculties the chief fource of animal power, 102. Minds of brutes pofTefTed 

 of original qualities, 155. The loweft fpecies of animals are endowed with minds, 

 1 j6. The mind of man undergoes changes, 287. 



Minerals, no analogy between them and vegetables, 1 2. 



Modefty. The great defence and ornament of women, 237, 238. Is not confined to 

 the human fpecies, 238, 



Moles. Defcription of their manners and operations, 318. 



Monkeys. When fleeping, one afts as a centinel, 400. 



Motacilla. See titmoufe. 



Moths. An account of them, 93. Divided into two kinds, the fphins and phalaena, 

 ibid. All of them, when about to transform, fpin cods or clues of filk, 299= 



Motion. Spontaneous motion, 131. By what inftruments it is performed, 132. Vital 

 and involuntary motions, 133. Motions of animals proportioned to their weight 

 and ftrufture, 1 34. Motion gives animation and vivacity to the whole fcene of Na- 

 ture, 135. Deftruftive animals flower in their motions than the weaker kinds, 135. 

 Progreffive motion of the mufcle, ibid. Motions of the razor or fpout-fifli, 138 ; of 

 the fcallop, 139-, of the oyfter, 140; of the fea-urchin, 141 ; of the medufa, or fea- 

 nettle, 141. Motion of the mafon-bee fometimes retrograde, 143. The rate at 

 which found moves, 169. Children derive great happinefs from motion, 192. 



Mouflon, the original ftock of the flieep, 460. 



Multiplication. The hydra of Linnaeus multiplies by fending off fhoots from its body, 

 30. The bell-polypus multiplies by fplitting longitudinally, ibid. ; and the funnel- 

 fliaped polypus by fplitting tranfverfely, 31. The dart-millepes likewife multiplies 

 by fpontaneous reparation, ibid. Infufion-animalcules multiply by continued divi- 

 fions and fubdivifions, ibid. Puceron multiplies without impregnation, 34. A pro- 

 fufion of animal life one great intention of Nature, 392. Noxious multiplication 

 refrained by various caafes, 393, 394. 



Mufca. See flies. 



Mufdes. Their progreffive motion defcribed, 135. 



3 Y 2 Mufcle?, 



