GERMINATION OF SEEDS. £25 



tinder the mercury, to exclude the atmospheric air from the 

 bag as much as possible, by pressing and turning it round 

 many times. After the seeds were in the jar, the bulk of 

 the whole was increased to 20*11 cubic inches. I had no 

 opportunity of making any observation for some day3. Ori 

 the 2 1st of March it stood at 19"59> and the next day at 

 1&*9S, the difference of temp, and press, being allowed. A 

 part of the air being then conveyed to the eudiometer, and. 

 washed with limewater, 87 per cent disappeared, leaving A 

 residue of 13 parts; evidently showing, that the whole of 

 the oxigen gas was not expended. To corroborate this sus- 

 picion, I made several trials with the impregnated solution 

 of iron, but owing to the test riot being properly prepared j * 

 as I found that it acted on the quicksilver, which it should 

 not have done, the results were so anomalous and contra- 

 dictory, I forbear to state them. 



Exp. 9, The 18th of March, temp, 46°. press. 29*80. Germinating 

 Eleven germinating beans, weighing 508-3 grs., were ^ luluo * , * ea 

 passed up ajar containing 6*20 cubic inches of oxigen gas 

 of 99 per cent purity. After the beans were in, the scale v 



indicated 7*65 cubic inches. 



In 24 hours it had diminished to 6*80 ctibic inches; 

 In 24 hours more to • 6*50 



On the 24th of March the gas had considerably increased, 

 and upon trial with limewater 88*20 parts in 100 were ab- 

 sorbed. The beans were then taken out* and on being 

 weighed were found to have lost 6*90 grs. 



Exp. 10. The 19th of March, temp. 48*, press. 29*72. Germinating 

 Twenty germinating pease, weighing 125*5 grs., were P^ ase '» ox »8 ea 

 placed in an inverted jar, containing 1*60 cubic inches of 

 oxigen gas of 99 per cent purity. When the pease were in, 

 the whole indicated by the scale 1*95 cubic inches. 



In 24 hours it had diminished to • • 1*70 



In 12 hours more to • • • • 1*67 



In 24 hours more it had increased to 1*79 



On the 24th of March it had increased some inches, and 

 on a portion being examined with limewater, 94 per cent 

 disappeared. 



Vol. XXilI.-*J»vr, 1809. Q These 



