14 



DR. R. ANGUS SMITH ON THE 



The following results have been sent me by Dr. Frank- 

 land : — 



Air from laboratory of Owens College, 1852. 



Oxygen. 



November 20"883 



December 20-898 



Ditto 20-868 



Ditto zo'SyS 



M. LeblanCj in his researches into the composition of 

 the air (Ann. de Chimie et de Ph. t. v., 3rd series, 1842, 

 p. 248), gives the following analyses of inferior and impure 

 air : — 



(The amounts are given in weights, but have been 

 calculated into volumes.) 





Oxygen by 



Oxygen' by Carbonic acid 





weight, 



volume, 



by weight, 





per 1000. 



per cent. 



per 1000, 



1. Conservatory of Equatorial 









Plants, Terre de Buffon, 6 









o'clock in the evening 



230*1 



20-81 



? 



2. Seven o'clock next morning.. 



229'6 



20-76 



o-i 



3. Chemical Theatre, Sorbonne, 









before lecture 



224-3 



2IQ-6 



20-28 

 19-86 



6-5 

 10-3 



4. Ditto after , 



5. Bedroom in morning 



7 



229-4 



20-74 



0-4 



6. Hall of hospital three hours 









after shutting the windows 



229-1 



20-72 



0-8 



7. Same at 8 o'clock mornmg .. 



227-2 



20-54 



2-8 



8. Sleeping- room at the Sal- 









petriere, atmosphere sensi- 









bly bad 



225-2 



20-36 



8-0 



9. Another in a similar state ... 



226-0 



20-44 



5-8 



10. Salle d'Asyle, 116 cMldren; 









smell bad also 



227-1 



io"53 



27 



II. Salle d'Ecole Primaire, 2d 



arrondissement 



228-4 



20-65 





12. Same, incompletely ventila- 







ted ; no smell 



... 





47 



13. Same, quite closed ; a sensa- 









tion of heat, quickened re- 









spiration 







8-7 



14. Chamber of Deputies, in the 







ventilating-shaft ; no smell. 







=^■5 



15. Opera Comique, pit before 









end of play 







2-3 



16. Same theatre, centre boxes ... 





... 



4" 3 



17. Close stable, Ecole Militaire 



225-5 



20-39 



1-05 



18. Same stable, ventilated by 









vasistas 



229-0 



20-71 



2-2 





