236 EXPERIMENT STATION RECORD. [Vol.43 



A 8tiul>- was made of the changes that occurred when lime-sulphnr dihited 

 to summer spra.vinj^ strenjith was mixed with lead hydrogen arsenate and with 

 basic lead arsenate, and also to determine some means of overcoming the detri- 

 mental action on tlie insecticidal properties of lead arsenate wlien combined 

 with lime-sulphur. 



The results secured indicate that there is a considerable reaction between 

 lime-sulphur and lead hydrotren arsenate wlien mixed for a combination spray, 

 while the basic lead arsenate causes only a slight change in tlie lime-suljihui-. 

 Calculated from the original amount of lead liydrogen arsenate used, over o 

 per cent of the arsenic was found in a soluble form, tlius increasing the ten- 

 dency to cause burning of foliage and other injury. The total polysulphid con- 

 tent was reduced over 35 per cent, thereby decreasing the efficiency of the 

 lime-sulplmr. 



In view of the fact tliat basic lead arsenate is not available in large quan- 

 tities and lead hydrogen jirsenate must be used, an experiment was conducted to 

 determine the value of lime in preventing the devitalizing reaction. It was 

 found that the addition of slaked lime at the rate of 10 lbs. to 100 gal. of 

 lime-sulphur previous to adding the lead arsenate, would prevent to a certain 

 extent this reaction. The polysulphid content of the combined spray had de- 

 creased (mly a negligible amount, while the untreated lime-sulphur showed 

 a loss of almost 50 per cent of its fungicidal and insecticidal properties. 

 The presence of free lime prevented arsenic from going into solution as a 

 soluble salt, whereas where no lime was added a high percentage of arsenate 

 was found, indicating that over 12 per cent of the lead hydrogen arsenate was 

 decomposed. 



Gardens, their form and design, Viscountess Wolseley (London: Ednard 

 Arnold, 1919, pp. XIX-\-28It, figs. 1^8). — This work contains .suggestions on the 

 form and design of both large and small gardens of various kinds. Attention 

 is given primarily to the development of the garden as a whole rather than 

 to the color and arrangement of individual plants. The successive chapters 

 discuss entrances, hedged-in gardens, .surprise gardens, formal flower l^eds, orna- 

 mental pots, treillage, topiary, winter-gardens, rock gardens, suburban gardens, 

 paved gardens, garden houses and ornaments, kitchen gardens, public gardens, 

 Italian vineyards, the natural arrangement of trees and shrubs, garden plans, 

 and the future garden designer. A bibliography, chiefly of European literature, 

 relating to the sub.1ect is appended. 



The garden month by month, H. H. Thomas {London and New York: Cas- 

 sell ft- Co., Ltd., pp. [T'7//] -(-i52, figs. Slf). — A monthly working calendar dealing 

 with the necessary work of fruits, flowers, vegetables, and the greenhouse, pre- 

 pared with special reference to conditions in Great Britain. 



Preparation and care of a garden for vegetables, compiled by D. J. Brum- 

 LEY, T. C. Gkier, and F. L. Minge {Flooamoor, III.: T. C. Grier, 1920, 2. ed., rev. 

 and enl. pp. 51 + [16]). — A compilation of information on the culture and care 

 of the more common vegetables. 



[Brussels sprouts and carrots at Wisley in 1918] (Jour. Roy. Hort. Soc, 

 45 {1919), No. 1, pp. 125-130). — Data are given on variety tests of Brussels 

 sprouts and carrots conducted at the Wisley garden in 1918. 



United States grades for northern-grown onions, H. E. Truax ( U. S. Dept. 

 Agr., Dept. Circ. 95 {1920), pp. 4). — The grades here proposed are based upon 

 extended investigations by the Bureau of Markets of this Department in 

 centers of production and important markets. They have been carefully criti- 

 cized by many prominent growers, shippers, and dealers, and it is believed 

 that in their present form they will meet the requirements of the northern- 

 grown onion trade. 



