Br. Perchai on the EffeSii of Famitie, ^c. 517 



•and valetudinary incur a rifque in vifiting them. 

 For foul air, though ic contain not any conta- 

 gious particles, may yet poflefs a virulence, 

 that is capable, in particular habits, of pro- 

 ducing fever. Like certain poifons, it effcdls 



an 



,tc kept open, in the hours of labour, as may be compatible 

 with carrying on the operations of the machinery. 



II. The cafements are too fmall ; being in dimenfion, 

 only about one fixth part of the window. They are like- 

 wife placed high, and parallel to each other— a pofition 

 pbvioufly .unfavourable to complete ventilation : for the 

 inlet of the air ought to be lower than the outljet. 



III. Several fire-places, with open chimnies, fiiould be 

 erecled, at proper diftances, in ' each work room. The 

 floves, now employed, afford no fufficient palTage for the 

 ofFcnfive vapours generated in the rooms ; and incrcafe the 

 contamination of the air, by the eflhivia which they emit. 

 Turf would be the cheapelt, and alfo a very falutary fuel ; 

 for it confilh, chiefly, of the roots of vegetables': and 

 yields, in burning, a flrong, penetrating, and pungent 

 fmoke, whicli is likely to prove as good an antidote to 

 contagion, as that of wood is found to be, from long 

 experience. 



IV. The rooms Ihoul.d be daily fwept, and the floors 

 )va(hed, at ieaft once every week, with llrong lime-water 

 or with water impregnated with the fpirit of vitriol, or 

 fhe acid of tar. The walls and ceilings may be fcraped 

 and whitewaftied, at lirft, every month, and afterwards, 

 twice or thrice yearly. Lime freHi burnt, and as foon as 

 ;t is flaked, mufl be ufed for this purpofe, and the wafh 

 iaid on whilft it is hot. 



y. During the prevalence of the prefent ^tvtr, the 

 apjirtncnts, fliould be fumigated weekly with tobaccp, 



^^ ^ i Brimfto53 



