16 N. H. AGR. EXPERIMENT STATION [Bulletin 204 



for temporary storage of doctors' automobiles. While this structure is of 

 wood, it rests on a cement foundation. No termites were discovered in any 

 part of it (Fig. 3, G.). 



South of the men's pavilion and distant about 75 feet were the remains 

 of an old frame barn, including the cellar, old foundation stones and some 

 large timbers lying on the ground. (Fig. 3, H.) Large numbers of termites 

 were discovered here. Some of the old timbers were infested and these were 

 destroyed. Repeated search disclosed numerous termites on turning over 

 stones. These were destroyed by the use of hot water and later by the use of 

 a mixture of Phinotas oil and water, as will be described later. Southwest 

 of this bam and still farther away from the hospital buildings was a frame 

 house (not sho^-n in Fig. 3). There was some evidence of termite work in 

 the lower part of the house. Later, this building was moved away from 

 the premises. 



Between the frame dwelling and the hospital building were the stumps of 

 two or three trees that had been cut off close to the ground and graded over. 

 These were uncovered and were found infested. They were dug out as much 

 as possible and were treated in the same fashion as the earth beneath the 

 stones of the barn. Also, some buried pieces of boards were found in this 

 general area where they had been covered by grading. These were treated 

 in similar manner, (Fig. 3, J. J.) 



Toward the rear of the men's pavilion a small hotbed about 4 feet square 

 had been built, immediately in front of one of the basement windows. (Fig. 

 3,K). This was found to be riddled. Large numbers of termites were dis- 

 covered in the dry manure remaining within the hotbed. All of this was 

 removed and destroyed. 



In the rear of the basement corridor leading from the administration build- 

 ing to the women's pavilion a root cellar had been constructed two or three 

 years before. The waUs were of cement and brick and the floor of cement. 

 There were no outer windows. (Fig. 3, L; Fig. 2, J.) The insects had 

 gained entrance through cracks in the cement floor. From the point of 

 entrance they had constructed covered galleries over the floor and wall to a 

 distance of several feet. The root cellar received a two-fold treatment. 

 First, it was fumigated with carbon bisulphide, which was poured into the 

 cracks in the cement, the building being kept tightly closed for a day or two. 

 Follo\^aag this the cracks were sealed by filling them with hot tar. This 

 was used in order to have a somewhat flexible material that presumably 

 would not open up, allowing further entrance of the pest. Since this was 

 done, no termites have been discovered in the root cellar, although for a 

 long period thereafter there were large numbers of them constantly dis- 

 closed under trap boards placed in the adjacent area outside. 



Because of the large numbers of termites that were discovered through 

 much of the surroundings of the building it was felt that a good deal of danger 

 existed that the pest might again find entrance. With the intent of reducing 

 this danger or perhaps obviating it, the earth next to the foundation wall and 

 to a depth of about 3 feet was removed aU around the outer walls of the 

 entire structure. This made a trench about 12 in. to 18 in. wide. The 



