XXXV 



day was 68°. 2. This is a very ordinary temperature for January. 

 At some time during the last 50 years that temperature has been 

 reached on 25 out of the 31 days of January. 



JFebruary 18^ /i, 1889. 



Vice-President Dr. Leete in the chair; seven members 

 present. 



Hon. Wm. McAdams presented a paper entitled "How the 

 Mound Builder made his Stone Axe," and exhibited a number of 

 stone implements. He thought there were unmistakable indica- 

 tions to show that these implements were made by chipping oft' 

 the stone with pieces of flint and not by grinding. 



March ^th, 1889. 



President Nipher in the chair ; three members present. 



Prof. Nipher exhibited a chart showing the average tempera- 

 ture of February for the past 53 years, from which it appeared 

 that the past month (February, 1889) was slightly colder than 

 the average. 



He also exhibited a drawing of a new pressure gauge that he 

 had designed for testing steam gauges and engine indicators up 

 to 300 lbs. pressure. 



March iSth, 1889. 



President Nipher in the chair ; four members present. 



Prof. Nipher remarked that the winter of 1S8S-9 has been 

 slightly warmer than the average, the temperature having been 

 34°. 3, while the normal is 32°. 3. The warmest winter on record 

 was 40°. 8 in 1877-78, the coldest 35°.! in 1884-85 ; the extreme 

 range between our warmest winter and coldest winter is there- 

 fore 15°. 7. During the last six years the winters have been ab- 

 normally cold, one of them having been the coldest on record. 

 It is this fact which makes the present winter seem abnormally 



