16 



Weather effects. A strong west breeze was blowing on 

 March 4th and 6th., but this moderated on the Tth, and the 

 fat contents of the milk increased I'l per cent, that afternoon 

 over that of the previous afternoon. The cows had been out 

 about five hours on each of these days. On April 5th and 8th 

 there was comparative calm after wind, and on each of these 

 days the afternoon's milk had J per cent, more butter fat. 

 On April llth a strong north-west breeze was blowing, and 

 the fat went down by '3 per cent. A cold north wind con- 

 tinued till April 18th, accompanied by a considerable drop in 

 the fat of the afternoon's milk on many of the intervening 

 days, although there was an unaccountable rise of 1 per cent, 

 of fat during one of them. On April 19th a calm day followed 

 and the fat increased. The fluctuations in percentage of fat 

 were greatest during the cold weather with north winds 

 between April llth and 25th. Wet weather with no wind 

 followed till May 6th, during which time the afternoon's milk 

 had more fat and less variation in amount. The cows were 

 usually turned out five to six hours a day from March 4th till 

 May 8th. They were turned out for about half that time on 

 April 12th to 15th, and on May 2nd, 3rd, and 6th. On five 

 of these seven days the afternoon's milk had an increased 

 amount of butter fat, and this may have been prevented by 

 the severe weather of the remaining two days. On May 22nd 

 the evening's milk was 1 per cent, richer in fat than that of 

 the morning, this being a warm day after a cold night. 

 Apparently the cold night reduced the fat percentage of the 

 morning's milk, but the warm day which followed consider- 

 ably increased it. On June 18th, when it was fine after a 

 cold, wet night, there was 1'2 per cent, more fat in the 

 evening's than in the morning's milk a similar result to what 

 had taken place on May 22nd. Again, on April 9th, a strong 

 wind was blowing when the cows were turned out during the 

 day, and this may be the cause of the evening's milk being 

 no richer on that day than that of the rooming. On June 4th 



