No. 474] NOTES AND LITERATURE 465 



The variability of wheat varieties in resistance to toxic salts is the 

 subject of Bulletin 79 of the Bureau of Plant Industry, U. S. Depart- 

 ment of Agriculture. 



A paper on the vitality of buried seeds, by Duvel, forms Bulletin 

 S3 ofjthc Bureau of Plant Lulustry, U. S. Department of Agriculture. 



A mechanical study of thistle-down as a parachute is published by 

 Dandeno in Science of November 3, 1905. 



Figures of some natural tree grafts arc published by M. P. Wheeler 



An analysis of the i)lant geography of Canada, by Drununond, 

 appears in vol. 8, part 1, of the Transactions of the Canadian In- 



Plants characterizing the life zones of Texas are listed by Bailey 



The fonvsi .ondiii..,,. of the (iihi Kivcr Forest Reserve, N. M., are 

 discussed bv liixon iu I'mj, ,.;n,„il I'njur JO of the U. S. Geological 

 .Survey. 



A note on G. J. Graliain an<l ^b-^i.■;,„ <•< .llrciions of 1S27-9 is 

 published by Britten in Tl. Jm.mal ,j n<-lm,:i U.v November. 



The relations of tlic llora^ of tli.- Nortlimi Ailanti.'. ilir Polar Sea, 

 and the Northern Pacific arv .■onsi,l,-rr.l by Sinunons in Hd. 1!). Heft 1, 

 of the second Abteilung of Beihejte zum bofanisc/ien L'enimlblatt. 



