10-20] HORTICULTURE. 141 



treatiso on tlie culture nnd stonific of swcot potaloes in Now .Torsoy, incluiliiiLC 

 descriptions of the important pliases of growing the crop and liandlinj; it from 

 liarvesting to marketing. 



The supply and distribution of Connecticut Valley cijjjar leaf tobacco, 

 S. n. DkYati-T (MasKachuncttK N/o. Bui. JH.i U!H!)), pp. VI + I4:i-2.iO, pis. 9, fujs. 

 15). — Tliis l)ulietin presents tlie history of Cotuiecticut Valley tobacco produc- 

 tion and the cigar industry, and discusses market ing Connecticut Valley cigar 

 leaf tobacco. In the hlstori(;al treatment of the subject statistics are presented 

 showing the growth of the industry, and other topics dealt with include distri- 

 huiioii of acreage, types of cigar leaf tobacco, tobacco soils, varieties of sun- 

 grown and shade-grown tobacco, yields, cost of production, tobacco insurance, 

 and tenancy. 



The discussion of marketing traces the handling of manufactured tobacco 

 from thu produ<'er to the manufacturer, points out the finictions of the various 

 parties involved in the .sale of the product, gives statistics showing the quant i- 

 lies handled, describes the preparation of the tobacco for market by the grower 

 and the packer, considers the cost of the packer's preparations and that of 

 storage, lists freight rates to principal manufacturing centers and shipments 

 and receipts of tobacco at local shipping points during recent years, enumerates 

 the grades, standards and principal varieties, and reviews the situation with 

 regard to prices and their distribution among farmer, landowner, and dealer. 



The bulletin concludes with a brief note on cooperation in marketing tobacco, 

 reconunendations regarding the tobacco industry in the region, a list of refer- 

 ences to tobacco literature, and a reproduction of the by-laws of tobacco 

 growers' associations. 



Whorled milkweed, the worst stock-poisoningj plant in Colorado, W. L. 

 JlAY {Colorado Sta. Bxil. 255 (1920), pp. 3-39, fins. 29).— This bulletin discusses 

 the losses caused by whorled milkweed (Asclepias galioides) when eaten by 

 stock, describes the plant, and outlines its distribution with a view to its 

 better identilication, points out the conditions under which poisoning occurs, 

 and reports the results of ei'adication studies. It is stated that the plant is 

 well distributed in southern Colorado in irrigated sections from 5,000 to 7,000 

 ft. in altitude. The plant is recognized also as a very persistent weed. The 

 most promising eradication measure tried was grubl)ing or plowing out the 

 plants just before the seed ripens, followed by grubbing out any green shoots 

 that may appear later in the fall, and then planting a heavy smother crop, such 

 as winter wheat. In one experiment 3 applications, during a dry summer, of 

 10 Ib.s. of salt in 5 gal. of water on an area 10 ft. in diameter did not kill the 

 plants in 1!J18 but prevented their appearance in 1919. 



Conimon thistles, J. G. Fiskk {New Jersey Stns. Circ. 113 (1919), pp. 7, 

 figs. 5). — Descriptions of the Canada thistle {Circium arvense), bull thistle 

 (C. Innccolatum) , and sow thistle (Honchus arvensis) are given, mainly with 

 reference to their distinguishing characters, manner of spreading, economic 

 importance, and methods of control and eradication. 



HORTICULTURE. 



An investigation in transplanting, .T. C. Whitten (}fissouri f>tn. Rmcarch 

 ; Httl. 3.] (1919), pp. 3-73, pis. J,, fi(f. 1). — Following several years of preliminary 

 observations, the station began a definite investigation in 1908, with a view lo 

 iii-ording accurately the results of fall and spring planting of various kinds 

 of trees and other plants, and, if possible, to determine the reason for any 

 difference in the behavior of the tre(?s. The results of this investigation are 



h 



