16 
jST. C. Agricultural Experiment Station 
Fig. 4. Photograph of a Kjeldahl Digestion Shelf Used in the Experimental Work 
la. The shelf ; lb. The digestion flasks ; lc. The glass door to hood ; Id. flue to conduct 
the gas out of the hood. 
2. The water still used to produce the distilled water. 
3. The water or steam bath used in evaporation of excrements. 
