324 JOURNAL OF THE ROTAL HORTICULTURAL SOCIETY. 



add 2 gallons paraffin, churn whilst hot ; will keep indefinitely if sealed ; 

 for use dilute with 10 to 25 parts of water for aphids and tender cater- 

 pillars. 



Soap wash : 1 lb. whale-oil soap in 10 or 20 gallons of water. For 

 scale insects, 1 lb. to a gallon water. Apply warm (135° Fahr.) during 

 dormant season. Soap wash at 1 lb. to 12 gallons of water on Peas took 

 at rate of 12 lb. soap per acre to spray. 



Alkali wash : Potash solution in dormant season. Destroys eggs of 

 aphis. Use at strength of three degrees on a Beaume acid spindle. 



Sulphate of copper : 2 lb. to 50 gallons of water. Good winter wash 

 for orchard trees. 



Tobacco decoction : | lb. tobacco stems or leaves boiled in each 

 gallon of water, diluted five to ten times for aphis. 



Tracheal poisons include : Pyrethrum, using 1 oz. to a gallon of water, 

 or dusted over plants mixed with two to four times its bulk of flour or 

 lime ; tobacco fumigation ; tobacco vapour ; carbon bisulphide ; and 

 hydrocyanic acid gas. — C. H. H. 



Iris Kaempferi. By Otto Bailiff {Journ. Hort.y.S23; April 10, 

 1902). — Plant in spring in rich soil well exposed to the sun, and saturated 

 with water all the growing time. Seedlings do far better than divisions. 

 Selected names are given. They do very well in Cheshire planted in 

 ornamental ponds of which the water level is constant, with a few inches 

 of water over the crowns all the year. — C. W. D. 



Iris pelog'OnuS, n. sp. By L. N. Goodding (Bot. Gaz. xxiii. No. 1, 

 p. G8). — Its nearest ally is /. missouriensis, differing in size, colour, and 

 width of leaves, &c. — G. H. 



Iris spuria in Lincolnshire. By E. A. Woodruffe-Peacock (Joum. 

 Bot. 471, pp. 101,102; 3/1902). — A record of this species apparently 

 wild at Huttoft, known for at least a century. — G. S. B. 



Iris, Winter-flowering*. By Jules Rudolph (Bee. Hort. 

 pp. 43, 44 ; January 10, 1902). — With woodcuts of I. reticulata and 

 I. persica and cultural instructions. Potted October -November and 

 kept in frames ; matted in severe frosts. When buds appear transfer to 

 greenhouse, when they flower in eight to twelve days. After flowering, 

 when frosts are over, plant out, and lift in July for replanting in autumn. 



C. T. D. 



Irrigation in the United States. By Professor Elwood Mead 

 (U.S.A. Dept. Agr. (Office Exp. Stn.), Bull. 105 ; June 1901 ; illustrated). 

 A comprehensive pamphlet on the above subject, being the testimony 

 of Professor Mead before the U.S. Industrial Commission. " His 

 testimony presents a review of the irrigation situation in the U.S., 

 including not only the arid region of the West, but also the humid 

 B( ction of the South and East, where in two States alone more land has 

 boon brought under irrigation during the past five years than in any 

 ringle State in the arid region during the same period. 



" The practical aspects of extending public aid to irrigation, either 



