866 



0.002 per cent of oxide of copper in one case and not a trace of copper in 

 another. The amount of copiier on the surface of apples sprayed with 

 Bordeaux mixture was at the rate of 0.0005 of an ounce per barrel of 

 apples. Xot a trace of arsenic was found, thoufjli the apples had been 

 sprayed three times with Paris green before July 1. 



Plan for experiments icith fungicides and insecticides in 1892 (pp. 

 41-43). — Brief directions for the application of fungicides and insecti- 

 cides to orchard and small fruits, and i>otatoes. 



Spraying apparatus (pp. 44-47). — Illustrated accounts of apparatus 

 tested at the station, including a pump attached to a cask, a knapsack 

 pump, and a syringe sprayer devised by J. Fisher, and termed tlie 

 "IIydrosi)rayer." The last named is descri])ed as follows: 



The barrel of the sprayer is 15 inches long; the piston has a stroke of 14 inches; 

 the diameter is 1.75 inches, and it will hold somewhat more than a pint. The nozzle 

 is pierced with ninety-nine holes, having a direction radiating from a point in the 

 rear, the effect heing to throw a spray 20 or more feet with a spread of 6 feet. The 

 holes are of smli a size that the s]>ray is as tine as is c(iin]>atil>le with the distance 

 mentioned. 



Massachusetts Hatch Station, Bulletin No. 18, April, 1892 (pp. 54). 



Soil TESTS with fkutimzkhs, \N'. I\ Bk<ioks, B. S. (pp. r)l-87). — 

 ('(>(»|)(Mativr cxitcriincnts were madt* in ISO! on 7 farms in the State, 

 inclnding tiie college farm, with lertilizt-is foi- potatoes, (»ats, and corn. 

 In the majority of cases these wore on land w Inch had been nsed foi- 1 

 or 2 years ])revi(»iis for simihir soil tests, and «'a<h \)\\\\ received the. 

 same kind of fertilizers as in the ]>revious tests. E;ich exj^'riment 

 iinlnded 1 acre, containing 15 twentieth acre plats separated by nnterti- 

 li/x'd strips. Five plats rem;iiin'd unnmnnred; one received KJO jiountls 

 of lime; another H!0 jiounds of land jdaster; another 5 cords of barn- 

 yard mannre ])er acre: and on the remainder nitrate of soda HiO pounds, 

 muriate of i)otash KiO pounds, and dissolve*! lioneblack .IL'O pounds per 

 acre were used singly ;ind in combinations of two and ;ill three. Meteor 

 ologieal observations wen* m;ide iti most eases. The results of the 

 aimlyses of the fertilizers and b;»rnyard manure tised, and the yields 

 are fully tabulated. In se\»Tal instances suggestions are made as to 

 the fertilizer mixtures most likely t(» prove beneliei;il on the soil in 

 tpic-tion. 



Experiments with potatoes (pp. 50-75). — These were 5 in number. In 

 every ex])eriment except one, which gave no n'liable indi<-ations, pot- 

 ash proved more b«'netiei;il than either phosphoric acid or nitrogen, 

 and the indications were that the soils needed i)otash especially f»u- 

 this cr<>p. In two cases this was a corroboration of the results of pre- 

 vious trials with corn. "The average net increase [with 5 cords of 

 barnyard manure] is 77 bushels against 01.2 bushels for complete 

 fertilizer, * » * Viewed from the standpoint either of profit or 

 recovery of plant food applied to the soil, these results are less satis- 

 factory than those with complete fertilizer." 



