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May 28. The leaves on tree 66 are rather thin and small and largely 

 at the tips of the twigs. The entire top of tree 67 is dead, but the buds 

 are starting on the trunk. 



June 20. Living young scaics arc found on tree 66. 

 July 2. A few living young scales are found on trees 62-64, 67, 75, 

 76. 97 and 98. They are rather abundant on trees 65, 77, 96, 99 and 

 100, and very abundant on trees 66 and 68. 



July 16. Trees 62-68 are sprayed with Good's whale oil soap no. 3, 

 using 1 pound to 5 gallons of water. 



July 30. AH the scales are apparently dead on trees 62 and 67, and 

 most of them have been killed on uees 63 and 64, some are dead on 

 trees 65 and 66, and on tree 68 the result is doubtful. 



Aug. 3. There are ver>' few or no young on trees 62, 63, 67, 75, 97 

 and 98, and few on trees 76, 77, 96, 99 and 100. Living young are 

 rather numerous on the badly infected limbs of trees 64 and 65 and are 

 abundant on trees 66 and 68. 



Sep. 7. There are few Hving young on trees 62, 96, 99 and 100 and 

 very few on trees 63, 75-77, 97 and 98. They are very abundant on 

 trees 64, 65 and 95 and exceedingly so on trees 66 and 68. The latter 

 was in an exceedingly bad condition last spring. Tree 67 has been cut 

 back to a mere stump. 



Fumigation with hydrocyanic acid gas, for San Jose scale. 

 A scries of tests were made with this substance for the purpose of ascer- 

 taining its efficiency and practicability in this latitude. A canvas tent 

 6x6x8 feel with a fixed pyramidal hood 7 feet high was constructed of 8 

 ounce duck thoroughly oiled with boiled linseed oil. The rectangular 

 part of the tent was supported on a light, wooden frame in order to reduce 

 the variation in cubic contents as much as practicable. The tent was 

 lifted with a 30 foot pole and an 8 toot gaff, and thus dropped over the 

 Xxet to be fumigated. The hood was kept extended during the process of 

 fumigation as shown on plate 13, which also illustrates the manner 

 of guying the pole and tent. The tent and apparatus for handling it cost 

 $38. A number could undoubtedly be made for less pro rata. Prof. W. 

 G.Johnson states that such tents can be procured in Mar>'land for $12, 

 which is much lower than any figure quoted in Albany, but probably this 

 would not hold in Maryland since the marked advance in prices. A farmer 

 could get a good pole and gaff from near-by woods at much less than the 

 market price. The bottom of the tent was provided with a sod cloth, a 

 flap some 6 to 8 inches wide, which was covered with earth in order to 



