Periodical Literature. 737 



Amount of Seed Crop. 



Average seed production 

 Trees in the open. In stands. of the locality. 



o + o - Failure - o 



1-2 -|- 0-0- Poor - I 



1-2 -f- i-i- Fair - 2 



2-3 -|- 2-2- Average - 3 



3 + 3 - F"ll - 4 



In accordance with the plan prepared for gathering data on seed 

 production, the weather conditions for the vegetative year have 

 been recorded. The severe cold and drought during the first part 

 of the summer have to some extent affected the development of 

 spruce and pine cones. Thus from the answers received it ap- 

 peared that on an average, 78 per cent, of pine cones were well 

 developed and 22 per cent, of the cones have not developed at all. 

 In spruce, 74 per cent, of the cones have developed and 26 per 

 cent, have not developed. 



Nine per cent, of all the answers showed that the pine cones 

 were injured by Pissodes validirostris and 42 per cent, of all the 

 answers mentioned an injury to spruce cones by Tortrix 

 strobiliana, Pucciniastrum padi, and other insects. 



The fall in most places was extremely warm and favorable so 

 that spruce cones have matured in some places much earlier and 

 began to scatter its seed. On the basis of the replies received, the 

 abundance of blooming in spruce and pine in 1910 was as follows : 



Average number of replies in per cent. 

 Blooming. Pine. Spruce. 



On the whole the blooming of pine was fair in the northern and 

 central portions of Sweden and poor in the southern part of the 

 country. Spruce bloomed equally well in the northern and in the 

 central part, but less in southern Sweden. The figures show also 



