EXPERIMENTS ON THE GERMINATION OF CONIFER SEEDS. 



23 



incubator. Where water at 100° C was used, the seeds were 

 immersed in boiling water for two minutes exactly, then poured 

 on to a tilter-paper and drained. 



Table I. 

 European Larch. Sown 17th May 1922. 



Table II. 

 Norway Spruce. Sown 31st May 1922. 



In the case of the iodine treatment, the solution was a 

 saturated aqueous solution of iodine crystals, which had been 

 prepared on the previous day. (Solubility of iodine in water 

 is approximately i in 5500). 



In the case of calcium chloride, the seeds were placed in 

 a 2\ per cent, aqueous solution for three hours, washed in 

 running water for about fifteen minutes, then soaked in a 

 5 per cent, aqueous solution for two hours, and again washed 

 in running water as before. 



