506 EXPEKIMENT STATION EECORD. 



" Ives was nnifornily poor in quality in 1910, but the data as to acid decrease 

 and proportional sugar increase are important 



" Norton shows a consistent and steady rise in sugar and a notable decrease 

 in acid during the period of sampling. Yet in the maximum sample the sugar 

 was lower and the acid higher than is usual for this variety when grown in the 

 most suitable environment. Evidently this grape requires a longer growing 

 season than is usual at Sandusky. The acid-sugar ratio, however, greatly 

 exceeds the figure for Catawba, and the percentage increase of sugar is the 

 greatest recorded for any variety. 



" Pocklington is of too little consequence as a vintage fruit to warrant an 

 extended study of the character here undertaken. . . . 



" The Seedling, whose peculiar composition led to the sucrose investigation, 

 was also included. The commercial importance of this grape in its present 

 development Is slight, but the remarkable fact that its ratio of loss of acid to 

 increase of sugar is 1 : 23.6 is a most notable item in the chemistry of the 

 grape. If . . . accompanied by greater vigor, a valuable product should result. 



" Worden is so much like Concord that chemically it is not necessary to study 

 the two varieties in an investigation of this nature. ... It is, however, notable 

 that this variety when fully ripe is rich in sugar, with a proper proportion of 

 acid." 



A chemical investig'ation of the oil of chenopodium, E. K. Nelson (C7. 8. 

 Dept. Agr., Bur. Chem. Circ. 73, pp. 10). — Four authentic samples of Maryland 

 chenopodium oils (3 from steam stills and 1 from an old-fashioned pot still) 

 were submitted to a chemical and physical analysis. The results on examining 

 the steam-still oils were as follows : Specific gravity at 25° C, 0.955 to 0.970 ; 

 njj at 25° C, 1.4723 to 1.4726; a^ at 25° C, —5.4° to —8.8°, and the solubility 

 in 70 per cent alcohol, 1:3 to 1:7. For the pot-still oil the figures were : 

 Specific gravity at 25° C, 0.9584; n^ at 25° C, 1.4725; a^ at 25° C. —6.3°, and 

 solubility in 70 per cent alcohol 1 : 6. 



In addition to the above the author examined a sample of chenopodium oil 

 obtained on the open market, with the following results : Specific gravity at 

 25° C, 0.9694 ; n^, at 20° C, 1.4780 ; a^ at 20° C, —0.35° ; solubility in 70 per 

 cent alcohol, 1:3; acid number, : ester number, 5. On fractionating this oil at 

 8 mm. about 15 per cent of hydrocarbon was obtained, which, when distilled over 

 sodium, yielded a pleasant smelling liquid having a boiling point of 176° C. 

 (766 mm.), a specific gravity of 0.8513 at 20° C, n^ at 20° C, 1.4828, and Ed 

 at 20° C. — 18.5°. Cymene was noted in the fraction. The fraction coming 

 over before ascaridol contained at least 4 per cent of dextro camphor, which 

 accounts for the low rotation of the sample. 



Some tests which were also made to determine the nature of ascaridol 

 seemed to indicate, according to the author, that it is an organic peroxid. 

 Formulas are presented which show a relationship to oxythymo quinon. 



Lime-sulphur wash, R. Harcourt {Ann. Rpt. Ontario Agr. Col. and, Expt. 

 Farm, 36 (1910), pp. 100-102).— This is a study of the effect of adding freshly- 

 slaked and air-slaked lime, and also lead arsenate, Paris green, and calcium 

 arsenite, to lime-sulphur sprays. 



The results for lime show that while there is a breaking down of the polysul- 

 phids, this is hardly in such an amount as to condemn the addition of lime to 

 lime-sulpur sprays. Air-slaked lime was less destructive to the wash than 

 freshly-slacked lime. The author, however, recommends the latter because it is 

 not so granular and does not settle rapidly. 



The results obtained for arsenicals correspond to the findings previously 

 reported (E. S. R., 23, p. 60), and show that "Paris green reduces the strength 

 of the wash nearly 50 per cent, whereas the reduction caused by the other two 



