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26  [AssempBiy — 
As growth depends upon actinism as well as temperature, it will 
be of little service to calculate from these varieties the sum of the 
temperatures during their maturing periods. 
The season of 1884 between killing frosts was from May 14 to 
October 15, or 154 days; the season of 1883 was from May 16 to 
September 30, or 137 days. 
Freping EXPERIMENT. 
Digestion of food. 
The experiments upon feeding commenced January 11, two cows 
being taken for the purpose. The cow-barn is a structure twenty- 
five by twenty-nine feet area and eight feet high, with a tight floor 
and sheathed ceiling, generally remaining above freezing tempera- 
ture, bnt during the coldest nights water freezing therein. The 
. food, excrement and-milk were weighed upon a Fairbanks silk scale, 
graduated to one-quarter ounce; the cows daily, in the morning be- 
fore being fed or watered, upon a Jones platform scale, graduated 
to one-half a pound. Milking commenced at 7 a. m., and 4:30 p. m. 
During four days of each period samples were collected for analy- 
sis, the dung and the urine being separated. This latter, a point of 
some difficulty, was accomplished by frequent visits to the stable, 
day and night, during the four days, the dung being gathered care- 
fully from the smooth floor, and the urine caught in sawdust, 
previously weighed.. After each feeding whatever food was left was 
collected for analysis, and weighed. 
We append in the following tables the data from January 11 to 
March 13, inclusive, in tabular form. 
