2*4 CATENATION OF MOTIONS. SECT. XVIt r. 



fubjedt, you ufe variety of mufcles in walking about 

 your parlour, or fitting at your writing table. 



5. Innumerable catenations of motions may pro- 

 ceed at the fame time, without incommoding each 

 other. Of thefe are the motions of the heart and 

 arteries ; thofe of digeftion and glandular fecre- 

 vion j of the ideas, or fenfual motions ; thofe of 

 progreffion, and of fpeaking ; the great annual cir- 

 cle of actions fo apparent in birds in their times 

 of breeding and moulting ; the monthly circles of 

 many female animals ; and the diurnal circles of 

 Seeping and waking, of fulnefs and inanition* 



6. Some links of fucceffive trains or of fynchron- 

 us tribes of action may be left out without disjoin- 

 ing the whole. Such are our ufual trains of recol- 

 lection ; after having travelled through an enter- 

 taining country, and viewed many delightful lawns r 

 rolling rivers, and echoing rocks ; in the recollec- 

 tion of our journey we leave out the many dittricts,. 

 that we crofTed, which were marked with no pecu- 

 liar pleafure. Such alfo are our complex ideas, 

 they are catenated tribes of ideas, which do not 

 perfectly refembie their correfpondent perceptions* 

 becaufe fome of the parts are omitted. 



7. If an interrupted circle of actions is not en- 

 tirely diflevered, it will continue to proceed con- 

 fufedly, till it comes to the part of the circle, 

 where it was interrupted. 



The vital motions in a fever from drunkcnnefs,, 

 and in other periodical difeafes, are inftances of 

 this circumftance. The accidental inebriate does 

 not recover himfelf perfectly till about the fame 

 hour on the fucceeding day.. The accuftomed: 

 drunkard is disordered, if he haa not his ufual 

 potation of fermented liquor. So if a confiderable 

 part of a connected tribe of action be difturbed, 

 that whole tribe goes on with confufion, till the 

 part of the tiibe affected regains its accuftomed ca- 

 tenations.. 



