484 EXPERIMENT STATION RECORD. 



bacillus bill iiifectuju may Ix" produced in guinea pigs, si)arro\vs. and other 

 exixn-imeuta! animals. 



Local eosinophilia in cases of infections with animal parasites, A. F. 

 FoLGER {Zischi: Infcktionskrank. u. Hyg. Haustien-, J, (1908), No. 1-2, pp. 102- 

 131, pis. 2). — Much attention has been given to the variations in the number and 

 relative proportions of leucocytes during the prevalence of infectious and 

 parasitic diseases. An increase in the number of eosinophilous leucocyt<* is 

 generally recognized as au important indication of pathological conditions." 



The observations reported by the author were largely made on tissues from 

 animals infested with Sarcosi^oridia, tluke worms, and cysticerci. SarcospoTidia 

 in tlie musculature of various animals as a rule caused no general disturbance, 

 the pathological changes being purely local. No alteration in the proportion 

 of eosinophilous cells was observed in such cases. In the liver of cattle and 

 sheep affected with fluke worms, the eosinophilous cells were present in greatly 

 increased numbers. An increase in the number of these cells was also observed 

 in the liver of hogs infested with Vi/sticercus tcnuicoUls. 



Notes on some parasites in Burma, G. H. Evans and T. Rennie {Jour. Trop. 

 Yet. HcL, 3 (1908), No. 1, pp. 13-27, pis. 10). — Elaborate anatomical and 

 descriptive notes are given on apparently new" species of Gastrodiscus found 

 in cattle and horses, the iiancreatic fluke in cattle, and an unknown species of 

 (Jastrothylax. 



RURAL ENGINEERING. 



Installation of an experimental drainage system, AY. Robertsox and J. T. 

 Stewart {Mitincsola 8ta. Bui. 110, pp. 3-99, flgs. 62, map 1). — This bulletin 

 describes the installation of a complete system of open and tile drains on the 

 Northwest Experiment Farm at Crookston, by the University of Minnesitta. 

 under the supervision of a drainage engineer connected with this Ofiice, who 

 made the surveys and plans. The investigation made for planning the system 

 included a tojiographical survey, study of the rainfall conditions, soil exami- 

 nation and analysis, and soil water analysis. The problem was not only to 

 remove the rainfall from the farm but to prevent overflow from higher lands. 

 T'nderdrainage in the soil found here was considered an experiment and on this 

 account the depth and distance ai)art of the drains were varied, as well as the 

 kind of tile and the method of laying it. 



Tlie construction of open ditches by slii) scrapers is illustrated and discussed 

 with the figures of cost. Tile ditches were constructed by hand and by machine, 

 and the cost and methods of each are shown and compared. The operation and 

 construction of the traction ditcher which was used, and the difficulties encoun- 

 tered with it, are described in detail. The soil, a fine clay, was quite wet, and 

 (operating delays were frequent, due to slipping wheels, cups clogging, wet earth 

 on the rollers, and grass roots collecting on the knives, as well as breakage. 

 The soil finally had to be broken with a plow before the machine was used, and 

 the work frequently had to be supplemented by hand digging. The machine 

 used was a second-hand one, having been used for demonstration purposes at 

 the factory, and it is believed that many of the difficulties encountered would 

 be overcome by the modern improvements in the more recent machines. The 

 best condition for machine work is deemed to be in dry ground which is in 

 cultivation. 



Stress is laid upon the methods of protecting the outlets in tile drains. Out- 

 lets were constructed of wood box, sewer pipe, tile inclosed in cement, concrete 

 altutment, and metal pipe, and the total cost of each of these is shown, as well 

 as the method of construction. A tile record contains in tabular form comjilete 



