A. HENRY. Hybridisation of Elms. -- (Third Annual Report of 

 the Forestry Committee, Cambridge). Nature, Vol. 83, p. 358. 

 London, May 19, 1910. 



Interesting studies are being made in the hybridation of elms ; 

 astonishing vigour is displayed in^certain first crosses of these trees. 



R. ZON. Determining the time of year at which timber was 

 cu t. _ (Forestry Quart., 7, 1909, No. 4, PP- 402-409, pi- i; 

 E. S. R., March 1910. Washington). 



The author points out the greater economic value of wood cut 

 in winter over that cut in summer, and reviews our present knowledge 

 relative to methods of determining the time of year at which timber 

 was cut. Particular attention is given to the microscopical method 

 of distinguishing summer and winter wood, worked out by Rashevsky, 

 from which method it seems possible to determine, from the appear- 

 ance of the last wood layer, whether the tree was cut in spring, 

 summer, or during the dormant period of the year. 



R. H. REW. Importation of Wood and Timber in Great Britain 

 in 1909. (Agricultural Statistics, 1909, Vol. XLIV, p. III). 

 Board of Agriculture and Fisheries. London, 1010 (Cd 5268), p. 199. 



The total quantities and values of the chief kinds of wood and 

 timber imported during the past six years are shown and the 

 quantities of unmanufactured timber received from each country 

 since 1905 are shown in a new table. 



Unmanufactured timber is divided into the four categories: 

 i) hewn, 2) sawn or split, 3) staves, and 4) furniture woods .and hard- 

 wood, and the total value of the timber in these categories in 1909 

 was over 23 ooo ooo. In 1906 the value exceeded 27 ooo ooo. The 

 principal item in this total is that of sawn or split wood, the im- 

 ports of which last year amounted to over 5 700 ooo loads valued 

 at nearly 15 500000 consisting mainly of fir from Russia, Sweden, 

 Canada, the United States, and Norway. The imports of hewn 

 wood and timber amounted, in 1909, to more than 3 400 ooo loads 

 of the value of nearly 5 800 ooo, of which two-thirds were pit 

 wood or props largely from Russia and France. About two-thirds 

 of the oak imported was from the United States. The total value 

 of the imports of manufactures of wood was about 2 ooo ooo 

 annually. 



