262 THE CONTAGIOUS TYPHUS 



4. Removal of 4. If the floor of auy shed or stable in which dis- 



soil inlected by 



soakage. eased cattle has been standing is not constructed with 



special water-tight and impenetrable material, it must 

 be assumed to be infected to the depth of at least six 

 inches. This ground should therefore be removed, 

 together with any stones, pavements, or wood work 

 which may have been in contact with it, carted to a 

 piece of dry land and buried. Half-rotten wood is a 

 particularly favourable carrier of infection. Mortar, 

 bricks, loam, or any other lining of the sides of a pen 

 in which a diseased animal has been standing, should 

 be broken out and buried. 



b B flj Di9infection B. Disinfection by Fire. 1. Burning. All infected 

 i. Burning, articles of a minor value, or made of incombustible 

 materials, can be disinfected by exposing them to a 

 heat which will char organic matter. To this class of 

 articles may be reckoned racks of wood or iron; cribs 

 or mangers of wood, iron or stone; leather collars and 

 straps, ropes and chains ; dry manure, residues of 

 fodder from which diseased cattle have eaten; and all 

 such small articles of little value which can easily be 

 replaced by new ones. Chains may be exposed to a 

 dull red heat; all other articles may be heated over a 

 fire of coal, brushwood, or straw until well scorched. 

 All new articles of ironware should be bought in a 

 galvanised state, to prevent the formation of rust, the 

 accumulations of which form convenient seats for in- 

 fectious matter, and for the same purpose it is desirable 

 that iron articles which have been disinfected by heat 

 as above should afterwards be either galvanised, or, at 

 least, while hot be treated with resin, to cover them 

 with a durable varnish, or should be varnished or painted. 



