1910.] Quantitative Estimation of Hydrocyanic Acid, etc. 



587 









HCN found, expressed in 





HCN injected, expressed 

 milliontlis gramme per 



in 



millionths gramme per 

 gramme tissue. 







gramme body weignt. 



















Blood. 



Brain. 



Heart. 



Muscle. 





Eipt. 

















1. 





50 



83 

















2. 



,, stomach 



167 



30 

















3. 





50 



28 















plasma 25, next day 2'5 ; cor- 

 puscles 30, next daT 21. 



4. 





0 



0 



0 













5. 





30 





45 











plasma 24, corpuscles 32. 



6. 





42 





198 











„ 58, „ 99. 



7. 



„ „ potentially in 

 amygdalin 



4 



7 





— 



— 





S. 





42 



24 



7 



18 



0 





9. 





4-4 



6 



6 



11 







10. 





16-7 



30 



59 



77 



11 





H. 



„ „ as NaCN 



1-2 



3 



9 



9 



0 





12. 



„ „ as KCN 



1 



5 



11 



4 



0 





13. 





0 



0 



0 



0 







14. 





0 



0 



0 



0 







15. 





1-8 



11 -0 



14-3 



17 -5 



0 



medulla 14, cord 6. 



16. 





1 -5 



1 -0 



1-5 



0 





17. 





18 



25 -5 



16 -4 



14 -7 



0 



stomach 44, duodenum 6. 



18. 



„ inhalation f?)30 



12 -fi 



8 



15-6 



0 





19. 





4-7 



15 -4 



1-7 



11 



0 



stomach wall 74, stomach 

 content 92 "6. 



20. 





3-4 



4 



1 



2 



0 



stomach 0. 



This table, in which the numbers express millionths of a gramme per 

 gramme (or milligrammes per kilogramme) injected and extracted, shows 

 very clearly that hydrocyanic acid goes to some organs {i.e. to the heart and 

 to the brain) rather than to others {i.e. the muscles). This is particularly 

 evident where the quantity of poison injected has been very small, i.e., in 

 Experiments 11, 12, and 15. 



