1892.] 



PUBLIC DOCUMENT— No. 33. 



105 



Hay from Salt Meadows. 

 [Sent on from Newbury, Mass.] 



Moisture at 100° C, 

 Dry matter, . 



Analysis of Dry Matter. 

 Crude ash, 



" cellulose, .... 



" fat, 



" protein (nitrogenous matter), 

 Non-nitrogenous extract matter, . 



9.66 

 90.34 



100.00 



5.01 



27.84 



2.65 



4.35 



60.15 



100.00 



8.08 

 91.92 



100.00 



5.03 



27.82 



3.24 



3.77 



60.14 



100.00 



8.75 

 91.25 



100.00 



9.03 



31.41 



3.37 



6.72 



49.47 



100.00 



Methods of Analysis of Cattle Foods. 



1. Moisture. — Dry 2 grams in an air-bath at 100-110° 

 C. to a constant weight. 



2. Ash. — Char 2 to 5 grams in a muffle furnace at a low- 

 red heat, cool and weigh. Digest for a short time with 

 dilute hydrochloric acid ; collect the residue insoluble in 

 acid in a Gooch crucible, wash, dry and weigh. Subtract 

 this from the total weight for pure ash. 



3. Ether Extract. — Dry 2 grams at 100° C. for two 

 hours. Exhaust with anhydrous, alcohol-free ether, until 

 the extraction is complete. Dry the extract in the air-bath 

 at 100° C. to a constant weight. 



4. Crude Protein. — Determine nitrogen by the Kjeldahl 

 or soda-lime method, and multiply the result by 6.25 for 

 crude protein. 



5. Albuminoid Nitrogen. — Determine by Stutzer's 

 method, as given in the " Proceedings of the Association of 

 Official Agricultural Chemists," 1890 (pages 211 and 212), 

 except that the protein-copper is dried before being intro- 

 duced into the flask. 



6. Crude Fibre or Cellulose. — The method is described in 

 the " Proceedings of the Association of Official Agricultural 

 Chemists," 1890 (page 212). In this method 2 grams of 



