THE AMERICAN NATURALIST. [Vol. XXXVIII. 



are being published by I.agermann in current numbers of the 

 Journal of the Columbus Horticultural Society. 



The use of plants in controlling and reclaiming sand-dunes is con- 

 sidered by Hitchcock in Bulletin 57 of the Bureau of Plant Industry 

 of the U. S. Department of Agriculture. 



A paper by Sherman on gutta percha and rubber of the Philip- 

 pine Islands is published as a bulletin from the chemical laboratory 

 of the Bureau of Government Laboratories of the Philippines. 



An account of Se?iecio jacobxa as the causative agent of hepatic 

 cirrhosis of horses and cattle, is contained in the Annual Report of 

 the Department of Agriculture of New Zealand, for 1903. 



An economic account of annual flowering plants, by Corbett, is 

 published as Farmers Bulletin No. ig^ of the U. S. Department of 

 Agriculture. 



An economic account of the date palm, by Swingle, forms Bulletin 

 53 of the Br f i Unt industry of the United States Department 

 of Agriculture. 



Noriega contrasts true and false Jalap in Vol. 6, No. 3, of the 

 Anales del Instituto Medico Nacional of Mexico. 



An account of poison ivy is contributed by Brownell to Country 

 Life in America for June. 



A readable account of English herbals, by Agnes Robertson, is 

 contained in the Popular Scie?ice Monthly, for May. 



One of the most suggestive of recent horticultural books is " The 

 Tree Doctor," by John Davey (Akron, Ohio). 



An important paper on root trichomas of Pteridophytes and Angio- 

 sperms, by Leavitt, constitutes Vol. 31, No. 7, of the Proceedings of 

 ihe Boston Society of Natural History. 



A paper by Hus, on spindle formation in the pollen-mother-cells of 

 Cassia tomentosa, forms the concluding number of Vol. 2 of the third 

 series of Proceedings of the California Academy of Sciences, Botany. 



; through external influences is discussed by 

 ? Zeitung, Abtheilung i, of May i. 



