472 



EXPERIMENT STATION RECORD. 



in u regular way. The greater the heat given oat, the greater the calories produced 

 for 1 gm. oxygen absorbed, and vice versa. Therefore, either a given amount of 

 oxygen absorbed can produce different quantities of heat, or the oxygen found as 

 absorbed does not represent that to which tlie heat is due. This second alternative 

 appears the more probable. 



" (5) The influence of a meal, as ascertained on 3 different persons, is well marked. 

 Taking the midday meal, when mixed food is eaten, generally with a good appetite, 

 the calories emitted about 2 hours after lunch show a i increase over those given 

 out about 3 or 4 hours after breakfast The excess varies in different persons and 

 according to the kind and amount of food taken. 



"(6) The calories emitted per kilogram weight of the body are subject to marked 

 variations in different persons." 



The feeding value of salt-marsh hay, J. B. Lindsey and B. K. 



Jones (Massachusetts Hatch Sta. Bui. 50, pp. 3-19, Jigs, a).— The com- 

 position and digestibility of (! different varieties of salt-marsh hay are 

 reported, together with illustrated descriptions of the salt grasses, 

 remarks on the harvesting of salt hay, etc. It is stated that there are in 

 Massachusetts about 23,000 acres of salt marsh, yielding some 21,000 

 tons annually, valued at $193,000. " Large quantities of salt bay are 

 used for litter, and for packing, while large amounts of the best grades 

 are fed to horses and neat cattle." 



The hays included in this study were black grass (Juncus gerardi), 

 fox grass (Spartina patens), branch grass (JHstichlis spicata), red top 

 variety containing considerable sedge, cove mixture (a mixture of the 

 redtop variety and black grass), salt hay mixture (a mixture of branch 

 grass, fix grass, and flat sage), and flat sage (Spartina stricta maritima 

 var.<?). 



The hay of black grass was rather damp and smelt moldy and was 

 not relished by the animals, although they ate it. The branch-grass 

 hay was in poor condition being very damp with a musty smell; it was 

 not eaten readily by the animals. 



The composition of the hay as compared with that of common hay 

 was as follows : 



Composition of hay of salt (/raises. 



English hay . 



Black grass 



Fox grass 



Branch grass — 



Redtop 



(Jove mixture 



Salt-hay mixture 

 Flat sage 



Water. 



l'ff cent. 

 13.00 

 16. 00 

 17.00 

 •21.00 

 13.00 

 18.00 

 16.00 

 17.00 



In dry matter. 



Protein. 



Per cent. 

 7.55 

 8.71 

 8.76 

 7.87 

 7.80 

 8.82 

 6.48 

 7.82 



Fat. 



Per cent. 

 2.48 

 2.48 

 2.46 

 2.82 

 1.82 

 2.10 

 2.51 

 2.91 



Nitro- 

 gen-free 

 extract. 



Per cent. 

 48. 40 

 52.23 

 54.31 

 55.00 

 51.54 

 54.32 

 54. 26 

 49.77 



Per cent. 

 36.68 

 28.71 



26. 96 

 26.46 

 32.32 



27. 57 

 26.77 

 29.71 



Ash. 



Per cent. 

 4.89 

 7.87 

 7.51 

 7.85 

 6.46 

 7.19 

 9.98 

 9.79 



"In chemical composition they quite closely resemble an average quality of English 

 hay. They contain ahout the same amount of protein, less fiber, and rather more 

 extract or starchy matter, and ash. The excess of ash is due to the presence of salt. 

 In fertilizing constituents, the same amount of nitrogen was found as in English 

 hay and two-thirds as much phosphoric acid and potash." 



