358 



convention at Ottawa in February, 1890, Tlie oomposition is j^iven ot 

 the leaves of Duchess of Oldeuburg, Tetofsky, Wealthy, Fameuse, and 

 Iforthern Spy apple trees, collected May 25 and September 20, and 

 from these analyses is calculated the amount of nitrogen, phosjdioric 

 acid, and ])otash contained in 1,000 pounds of fresh leaves from each 

 variety. The averages of the 5 varieties. at each gathering are gl\en 

 in the following table : 



Analyses of apple tree leaves. 



Gathered May 25 



Gathered Septfiiiher 20 



In green 

 leaves. 



Pr.et. Pr.ct.Pr.ct. 



72. 3t; 2. .33 2.94 

 60.71 3.46 I 2.4<S 



In 100 parts of ash — 



B . 



3 





Pr. et. Pt. et. Pr. et. P'r. et. Pr. et.Pr. et. Lbt. i Lbi. I Lb». 

 10.47 lu. «2 17.40 9.77 1.49 1.07 7.42 2.45 i 2.52 

 5.82 11. G3 27.91 4.81 1.41 i 1. 14 8.87 l.W 3.92 



Fertilizing injjtre- 



dieuts in 1,000 

 pounds of leaves. 



Effect of solutions of copper sulphate, iron sulphate, and '' a<iricultural 

 hluestone''' on the ritality of seed irheat (pp. 14(»-14S). — In tliis test Ked 

 Fife wheat, containing 1)7.5 percent of seed capableof germinating, was 

 used. The agricultural bluestone was found to consist of 00.,> per cent 

 sulphate of iron and .">0.7 i>cr cent siilphat4' of copper. The solutions 

 were pre]>aied l»y dissolving 1 iioiind of the material in S gallons of 

 water. In the Urst exiH'iimcut s<H'd was soaked in each of thesr solu- 

 tions iluring .">(» hours, and at the <'nd of that time was sown in earth 

 in the conservatory to dctrrmine its jx'iirntage of vitality ; in tin* latter 

 experiment the wheat was merely sjuinkled with the ditferent .solutions, 

 allowed to dry, and sown at once. The results lea<l the autlutr to <-on- 

 clude that — 



(1) A sulutidii of siiljiluilr of ( ojiiKT <if till- .stivii^^th of 1 ]iouii<l to S pillions of 

 wiitf r has the effeit of drstroyinj; a miiiilM-r of wheat germs, and tliat even wln-n 

 tlie snlphate of eo])per i.s present only to one third of this ainonnt (a.s it is in tlio 

 agricultural lilue.stonw) the injurious action is still strongly marked. 



(2) A solution of .sulphate of iron of the same strength has eventually but littlo 

 destroying action on the wheat see<l, though at lirst the jdants from seed so treated 

 have their growth somewhat retarded. 



(3) The length of time that the .suljdiatt' of copper is in contact with the seed 

 determines, to a large extent, the amount of damage done to the vitality of tlio 

 germ. If sprinkling be sullicient to destroy the .smut spores tlie grain should not bo 

 left in contact with the solution longer than necessary, but dried and sown at once. 



The results of tests made to determine the value of solutions of sul- 

 phate of iron, sulphate of copper, and agricultural bluestone used 

 in the strength given above for preventing smut in wheat '• seem to 

 indicate that none of the solutions tried are etticacious in preventing 

 the development of loose smut." Experiments on this subject are to be 

 continued. 



