538 EXPEEIMENT STATION EECOED. 



The addition of soft soap to lead arsenate for spraying purposes, D. R. 

 Edwardes-Keb {Jour. Southeast. Agr. Col. Wye, No. 22 (1913), pp. 359-362).— 

 The effect of solutions of soft soap upon arsenate of lead suspensions was 

 studied by preparing the mixture in different ways, filtering after allowing to 

 stand for about one-half hour, and determining the soluble arsenic in the 

 filtrate. 



The results as here summarized show that the addition of a 1 per cent soap 

 solution to lead arsenate, either homemade or in commercial form, does not 

 lead to any appreciable increase in the amount of soluble arsenic. In the case 

 of the homemade material, however, soap solution must not be used for making 

 up the lead acetate and sodium arsenate solutions in place of water, as not 

 only is there a marked increase in the soluble arsenic but in addition the 

 precipitate is obtained of such a texture and consistency as to render impossible 

 its application by spraying. This precipitate consists of a mixture of lead 

 arsenate and lead soap, a quantity of soluble arsenate equivalent to the lead 

 soap remaining in solution. The addition of soap solution to lead arsenate 

 paste does not, however, lead to the formation of any lead soap nor to an in- 

 crease in the soluble arsenic. 



Spray calendar, F. W. Faxjbot (Missouri Fruit Sta. Circ. 6 (1913), pp. 12, 

 figs. 7). — This circular contains a schedule for spraying apples and peaches and 

 other stone fruits, together with directions for the preparation of spray mixtures. 



New method of obtaining grafted peaches, A. Manaeesi (Stas. Sper. Agr. 

 Ital., Jf8 (1915), No. 1, pp. 57-60). — As a result of successful budding experi- 

 ments in which over 90 per cent of budded trees were secured, the author 

 recommends the use of the so-called June budding method which is frequently 

 employed in propagating peaches in the southern peach districts of the United 

 States, but which does not appear to have been commonly used in Italy. 



Testing grape varieties in the Vinifera regions of the United States, G. C. 

 HusMANN (U. 8. Dept. Agr. Bui. 209 (1915), pp. 157, pis. 10, fig. i).— This bul- 

 letin gives additional data on the Department's viticultural investigations in 

 the Vinifera regions of the United States, previously repored on in 1910 

 (E. S. R., 23, p. 640), and reports on researches started since that date. 



A brief description is given of the twelve experimental vineyards in Cali- 

 fornia, with reference to their purpose, location, soil, and climatic conditions, 

 including weather data secured at each vineyard. Other important data pre- 

 sented in tabular form include cultural data of fourteen American species of 

 grapes whose varieties or hybrids are under test as resistant stocks; the rela- 

 tive growth rating of resistant and direct-producing varieties of grapes under 

 test, including a list of stocks worthy of special mention as having made excel- 

 lent growth ratings at each of eleven vineyards; resistant varieties making 

 the best growth records in each vineyard ; improved American native and 

 Franco-American grape varieties which are being tested on their own roots ; 

 the relative behavior and value for different purposes of Vinifera varieties 

 tested by grafting on resistant stocks and by growing on their own roots ; and 

 the relative behavior and value for different purposes of improved native 

 American and Franco-American varieties tested. 



The investigations as a whole have shown that the adaptability of varieties 

 to soil, climate, and some other conditions can be closely forecasted, but con- 

 geniality of stock and scion must be determined by actual test. The best results 

 are obtained where the scion and stock ai'e congenial and both are suited to all 

 the conditions of the environment. Different species used as stocks for the 

 same variety may increase or diminish the vigor and productiveness of the 

 variety and the quality, size, and appearance of the fruit; cause it to ripen 

 earlier or later; and bring about varying results from perfect success to almost 



