638 EXPERIMENT STATION RECOED. 



potatoes and the otlior contained 10 bu. of sound and 1 bu. of rotten potatoes. 

 From these results the author concludes " that it is safe to store potatoes in 

 banlvs in this climate provided they are free from disease when put up and 

 the banks are properly made." 



Report for the year 1910 (Canada Dept. Agr., Tobacco Div. Bui. A12, pp. Jf''), 

 pis. 2). — This bulletin consists of 4 papers and an appendix. Earlier work at 

 these stations has already been noted (E. S. R., 24, p. 636). 



I. Ottawa Experimental Farm, F. Charlan. — This is a brief account of work 

 done at the Central Farm at Ottawa with the Comstock, Spanish. Canelle, 

 V6rel, and Montmelian tobacco varieties. Brief notes are given on the vari- 

 eties tested and on an attack by the tarnished plant bug. 



II. The Quebec tobacco experimental stations, O. Chevalier. — This is an 

 account of work done during 1910 at St. Jacques I'Achigan and St. Cesaire. 

 At the latter station the crop was practically destroyed by a hail storm. At 

 the former work was done with the varieties Comstock-Spanish Cuban, Big 

 Ohio, hybrid Comstock X Sumatra, hybrid Big Ohio X Sumatra, and Com- 

 stock X Sumatra X Sumatra, to determine the effect of nitrate of soda and a 

 proprietary fertilizer. Only a progress report of this work is given. Direc- 

 tions for making beds and for avoiding injury by insects and mushrooms are 

 followed by an account of tests of insecticides. In a preliminary test it was 

 observed that Paris green practically did not interfere with the growth of the 

 plants. Nicotin oxalate interfered only when used in a solution of 1 part to 

 50 parts of water or stronger. When used in the proportions of 1 : 25 and 1 : 10 

 all the plants were destroyed. Especially marked insecticidal effects followed 

 its use in the proportion of 1 : 125, at which strength 4 per cent of the plants 

 had to be reset as compared with 6.25 per cent when the strength was 1 : 250. 



The highest yields were produced by Big Ohio X Sumatra, Big Ohio, and 

 Comstock X Sumatra. In a test of 5 fertilizer applications much the latest 

 crop followed the use of a heavy application of manure, while the earliest crop 

 was obtained after an application of the same amount of manure with sulphate 

 of ammonia, sulphate of potash, and superphosphate. Notes are given on the 

 varieties tested. 



III. The Harrow Tobacco Experimental Station, W, A. Barnet. — Six acres 

 of Learning corn yielded 100 measured bushels of ears per acre of well-matured 

 hard corn. Six acres of Dawson Golden Chaff wheat winterkilled badly. 



Tobacco plants grown under glass were from 10 days to 2 weeks earlier than 

 those grown under cotton, and a hotbed under glass gave plants a week earlier 

 than a coldbed under glass. A solution of nitrate of soda gave excellent 

 results. An application of fyom i to i lb. of fertilizer per square foot 

 was followed by the best results. Swollen seeds gave as good results as dry 

 seeds and did not allow the weeds to get such a start. The plants under glass 

 and under cotton appeared to be about equally thrifty and strong. The use 

 of 20 ducks as insect destroyers in a 12-acre tobacco patch proved successful. 

 In a test of 4 different fertilizer applications the highest net returns followed 

 the application of 400 lbs. nitrate of soda, 300 lbs. sulphate of potash, 200 lbs. 

 superphosphate, and 10 tons of manure per acre. In another fertilizer experi- 

 ment an application of sulphate of potash and nitrate of soda gave the best 

 results, phosphoric acid apparently being least required for the Burley tobacco 

 which was used in this experiment. Notes are given on harvesting and curing 

 the crop. The author concludes that a moderate application of commercial 

 fertilizer should supplement barnyard manure if the largest yield of Burley 

 tobacco is to be secured. 



IV. Cleaning and grading tobacco seed, F. Charlan. — The author describes an 

 apparatus for the mechanical separation of seeds in which the seeds pass down 



