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Directions for use. To put up this rain-gage for use: 1. Let 

 the wooden cylinder be sunk into the ground in a level unshel- 

 tered place until its upper end is even with the surface of the 

 earth. 2. Screw the larger brass cylinder on the top of the 

 brass tube and place the latter into the hole in the axis of the 

 wooden cylinder, as shown in the figure, and the arrangement is 

 completed. 



The depth of rain is measured by inserting the scale into the 

 gage and noting the height to which it has been wetted by the 

 water when it is withdrawn. In order, however, that the water 

 may wet the scale, the superficial grease should be removed by 

 rubbing it with a moist cloth, previous to use. In case the 

 water cannot be made to adhere to the scale, a slip of pine or 

 other wood may be made of the same size of the scale, and this 

 inserted in its stead. The quantity of water may .then be mea- 

 sured by applying the slip of wood to the scale. 



Should the fall of rain be more than sufficient to fill the smaller 

 tube, then the excess must be poured out into another vessel, 

 and the whole measured in the small tube in portions. 



Care should be taken to place the rain-gage in a level field or 

 open space, sufficiently removed from all objects which would 

 prevent the free access of rain, even when it is falling at the 



