The principles of fruit-growing . rmometers should be read. reading of the wet-bulb thermometer from that ofthe dry. Find this difference in the column at theleft of the table. The dew-point will then befound at the intersection of the line opposite thisdifference and the column which is headed by thenumber nearest the air temperature (dry-bulbreading). Examples are given below: Dry-bulb thermometer 55° Wet-bulb therm^ometer 44° Difference 11° Dew-point from table 30° Dry-bulb thermometer 43° Wet-bulb thermometer 38° Difference 5^ Dew-point from table, between 27° and 33°, about 3
The principles of fruit-growing . rmometers should be read. reading of the wet-bulb thermometer from that ofthe dry. Find this difference in the column at theleft of the table. The dew-point will then befound at the intersection of the line opposite thisdifference and the column which is headed by thenumber nearest the air temperature (dry-bulbreading). Examples are given below: Dry-bulb thermometer 55° Wet-bulb therm^ometer 44° Difference 11° Dew-point from table 30° Dry-bulb thermometer 43° Wet-bulb thermometer 38° Difference 5^ Dew-point from table, between 27° and 33°, about 30^ dew-point table. Difference of reading ofdry and wet bulbs Temperature of Air —Fahrenheit. 15° 20°i25° 30° 35°j40° 45° 50° 55° 60° 65° TO 16 122 12 18 7 il4 1 i 10 4 38 43 35 41 33 39 30 36 27 133 24 30 20 27 16 24 48 53 46 52 44 50 55 42 48 53 40 46 51 37 43 49 34 41 47 31 39 45 28 36 43 25 33 40 21 30 38 17 27 35 11 23 32 5 18 28 12 24 1 58 6357 6260595755535149474542403734 696766646261595755535149474542. CHAPTER III. THE TILLAGE OF FRUIT LANDS. The study of the evolution of the ideas respect-ing the tillage of the soil opens one of the mostinteresting chapters in history. The subject is allthe more suggestive because tillage is such a com-monplace and almost universal labor that no onethinks of it as having had a history. Yet thepractice of the simple stirring of the soil has beenslowly evolved, like all other methods and institutions,through a long period of time, and as the result ofmany forces which were unobserved or even unknownat the time. We think of tillage as a custom ; andif one considers the condition of farming at thepresent moment, he would seem to be warrantedin such an association, for a custom is a habitwhich is not suggested by reason and inquiry. Per-haps the only reason which most persons could givefor the tillage of the land is that they are obligedto do it. It would seem to be the simplest and dull-est thing to till the soil. It i
Size: 1241px × 2014px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookaut, bookcentury1800, bookdecade1890, booksubjectfruitculture
