Method. — On March 1, 1918, small quantities of wheat 

 harvested in 1917 were sealed in three glass bottles — A, B, 

 and C, respectively. 



Test (1). — At the end of fourteen days the wheat in 

 bottle A was planted on damp soil under a sheet of glass. 



Result. — The grain germinated freely. 



Test (2). — At the expiration of twenty-eight days the 

 wheat in bottle B was planted on damp soil under glass. 



Result. — The grain grew freely. 



Test (3). — On September 13, just 196 days after being 

 sealed in bottle C, the grain was planted on damp soil under 

 glass. 



Result. — The grain grew freely. 



Conclusion. — The result of these three trials, which mark 

 progress in a long series of experiments, goes to show that 

 wheat may be stored in hermetically sealed receptacles for a 

 considerable period without impairing its vitality. 



Experiment 4. — To prove that dry grain can be safely 

 stored in an atmosphere rich in C0 2 gas for considerable 

 periods without injury to the vitality of the seed. 



Method. — Small quantities of grain harvested in 1917 

 and having good germinating qualities were placed in three 

 bottles — A, B, and C, respectively. The bottles were charged 

 with C0 2 gas and then sealed. The method of charging the 

 bottles was simple. C0 2 gas, generated in a flask from 

 marble and hydrochloric acid, was introduced by means of a 

 delivery tube passing through the stopper of the bottle. The 

 displaced air passed through a second tube into lime-water. The 

 lime-water was used to test the quality of the air expelled 

 from the bottle containing the grain. When the overflow was 

 rich in C0 2 the bottle was carefully sealed. 



Test. — At the end of fourteen days, twenty-eight days, 

 and 196 days, respectively, the grain in the three bottles was 

 tested by planting it on damp earth under glass. 



Residt, Bottle A. — After immersion for fourten days 

 in air rich in C0 2 gas the grain grew well. It appeared to 

 show more vigour than the untreated grain used in the check 

 experiments. 



Result, Bottle B. — The grain grew well after experiencing 

 the effects of C0 2 gas for twenty-eight days. 



Result, Bottle C . — At the end of twenty-eight weeks the 

 grain appeared not to have suffered as a result of confinement 

 in air rich in C0 2 . The grain germinated freely. 



Note. — It will be noticed that the results of germination 

 have not been expressed in percentages. To secure accurate 



