THE AIR-SPORA OF ENCLOSED SPACES 

 AIR-SPORA OF GLASSHOUSES 



The air of glasshouses has received Httle attention, in spite of the fact 

 that workers and crop plants in it may be exposed to high concentrations 

 of micro-organisms. Glasshouses may act as important spore emitters by 

 means of convection through open ventilators (Hirst, 1959). 



SHIPS 



Air in holds and living quarters on board ship was studied early by 

 Miquel (1886). A modern study of air in ships — including submarines, 

 which are relatively clean — is reported on by Ellis & Raymond (1948). 



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