Dkc. 1893.] BOTANICAL SOCIETY OF EDINBURGH. 



33 



Composition of the Air in the Flask. 



At start of Experiment. At end of Experiment. 



Oxygen 20-61% 7*82% 



Nitrogen 79-36% 80-06% 



Carbonic Anhydride 0-03% 12-12% 



100-00 100-00 



Volume of Am — c.c. % c.c. 



At start of Experiment ...99-54, containing 7936 Nitrogen=78-99 

 At end of Experiment ...98-75, ,, 80-OG ,, =79-06 



Gain= 0-07 



EXPERIMENT 5.-2,296 Grammes Steeped Barley. 

 Temperature during Growth, 15-3° to 15-5° C. 



Composition of the Air in the Flask. 



At start of Experiment. At end of Experiment. 



Oxygen 20-36% 0-05% 



Nitrogen 79-64% 76-48% 



Carbonic Anhydride 00% 23-47% 



100-00 



100-00 



Volume of Air — c.c. % c.c. 



At start of Experiment ...94-63, containing 79-64 Nitrogen = 75 -36 

 At end of Experiment ...98-20, ,, 76-48 ,, =75-11 



Loss= 0-25 



EXPERIMENT 6.-2,268 Grammes Steeped Barlev, 

 Temperature during Growth, 15*5° to 15 '7° C. 



Volume of the Confined Air. 



At start of Experiment, Nov. 6. 



Do. do. ,, 7. 



Do. do. ., 8. 



Do. do. ., 9. 



Do. do. .. 10. 



Do. do. ,, 11. 



At end of Experiii.ent, .. 12. 



c.c. 

 98-33 

 98-19 

 97-41 

 97-26 

 97-49 

 98-62 

 100-87 



Ditfer- 

 ence. 



c.c. 



-0-14 

 -0-78 

 -0-15 

 + 0-23 

 + 1-13 

 + 2-25 



State of 

 Germination. 



Just starting. 

 Full bud. 

 Short root. 

 Growing freely. 



Do. 



Do. 

 Long root. 



ruANS. hot. SOC. EDIN. vol. XX. 



