Jacobs Martin houses, where dwell the hosts of Purple Martins which 

 go forth to cleanse the air of insect pests, ever ready to descend, with 

 destructive effect, upon the foliage and vegetation below. 



The left hand cut shows two of the houses on my grounds; the one in 

 the foreground, a 45 room structure, and the one in the distance, near 

 the right margin of the picture is a 66 room mansion. The tree branches 

 spreading from the left, are those of a fall pippin apple tree. In this 

 tree in 1911, two families of catbirds and one family of chipping 

 sparrows were reared. 



The central cut is a 34 room martin residence,— a favorite with the 

 martins,— situated eighty feet west, or to the right, of the 66 room struc- 

 ture. 



The cut on the right shows a 20 room martin house erected last year, 

 in the green plot in front of the W. & W. R. R. passenger station, on 

 the opposite side of the street from my property. 



