DEPARTMENT REPORTS. 41 



ia No. 12, to the river is 5.24 feet, tlie greatest deptli is 7.5? feet, the least 

 depth 3.34 feet. The fall is unifoniily that of 2G-100 feet per 100 feet from 

 the silt basiu in field No. 12 to the north part of field No. 6 ; from thence it 

 descends •with a fall of 66-100 feet per 100 feet, which is maintained a distance 

 of 350 feet. The descent for the remainder of the drain is 3.26 feet per 100. 

 The Nvhole length of the main, or 8-inch drain, is 2,550 feet. Quick sand 

 exists near the bottom of the drain in field No. 6 and in a portion of field No. 

 8. Mr. McDowell and myself designed and had constructed, of iron, an ap- 

 paratus which constitutes in effect a movable curb. In the portion of the 

 drain now constructed, most of which is through sand saturated with water, 

 the use of this apparatus has proved very successful, and enabled the tile lay- 

 ing to go on continuously. The east line of the farm north of field No. 6 has 

 been surveyed and marked with permanent monuments. 



ICE HOUSE. 



By a resolution of the Board the construction of the College ice house was 

 put in my charge. The building was located near the dam, and set on a 

 foundation of square posts sunk into the ground about 5 feet. The building is 

 30 feet north and south, 20 feet east and west, and has a height of 14 feet to 

 the plates. Its capacity when well filled is nearly 200 tons. Each wall of the 

 building is sheeted both inside and out, and so constructed as to leave a space 

 between the inner and outer sheeting, one foot wide. This space is filled with 

 saw-dust. The roof is of dressed lumber and has a one-third pitch. The 

 building is constructed so that it can be covered with planed siding which may 

 be painted. 



An inclined plane with a run- way for ice and a walk for a man was built 

 from the river to the building. The whole cost, including the filling with saw- 

 dust and the inclined plane, was 8139.38. 



LIBRARY AND MUSEUM CASES. 



The state Board of Auditors gave notice that the cases formerly used in 

 the old State Library might be obtained for the College by simply removing 

 them. 



About 100 cases were obtained from the old State Library and reerected in 

 various places at the College. 



The total cost of removal and reerecting was 860.14. 



This cost was distributed as follows : 



Library cases _ 826 64 



Model Museum cases 13 03 



Laboratory 5 01 



Secretary's office 6 16 



President's office 5 73 



Stored in basement 3 57 



DAM ON CEDAR RIVER. 



The dam on Cedar river, back of Wells' Hall, has been finished, and the 

 balance of the special appropriation for this purpose has been expended. 



NEW INSTRUMENTS. 



The board authorized the expenditure of one-half the special appropriation 

 of 81,060, made to this department by the Legislature of 1878-9. AVith the 

 approval of President Abbot the following instruments were purchased : An 



