| Instrument Shelter (Figure 4) |
Frontispiece |
| |
| FIGURE |
PAGE |
| 1. |
Winter and Summer Vertical Temperature Gradients, in degrees Centigrade and Fahrenheit |
12 |
| 2. |
Showing light from lamp a passing into dust-free air at b, and passing out at c without illuminating the interior |
46 |
| 3. |
Standard Weather Bureau Kite |
64 |
| 5. |
Comparison of the Thermometer Scales |
67 |
| 6. |
Dry and Wet Bulb Thermometers |
68 |
| 7. |
Mercurial Barometer |
78 |
| 8. |
Continuous records of the temperature from 4 P.M. to 9 A.M. |
87 |
| 9. |
Continuous records of the temperature 5 feet and 35 feet above ground on a tower in a pear orchard |
95 |
| 10. |
Average dates of last killing frost in Spring |
96 |
| 11. |
Average dates of first killing frost in Fall |
97 |
| 12. |
Trade wind circulation |
99 |
| 13. |
Average surface winds and pressure of the globe |
102 |
| 14. |
How winds would blow into a cyclone on a non-rotating earth |
108 |
| 15. |
Deflection of wind due to earth’s rotation |
109 |
| 16. |
Annual, summer, and winter wind velocities with altitude |
110 |
| 17. |
Tornado Cloud |
145 |
| 18. |
The St. Louis Tornado of May 27, 1896, Shot a Pine Scantling through the Iron Side of the Eads Bridge |
147 |
| 19. |
The St. Louis Tornado of May 27, 1896, Shot a Shovel Six Inches into the Body of a Tree |
147 |
| 20. |
The St. Louis Tornado Drove Straws One half Inch into Wood |
149 |
| 21. |
Equinoxes, March 21 and September 22 |
163 |
| 22. |
Summer Solstice, June 21 |
164 |
| 23. |
Winter Solstice, December 21 |
164 |
| 24. |
Winter and Summer Solstices, and the Equinoxes |
165 |
| 25. |
As angle of incidence decreases from 90° to 10° the heat
received on upper end of blocks is spread over greater
area at bottom, and its temperature diminished |
165 |
| 26. |
Altitude attained by Sun at midday and length of its
track above the horizon at the Summer and Winter Solstices and at the two Equinoxes |
167 |
| 27. |
Summer day and Summer night temperatures in the same narrow valley |
204 |
| 28. |
Average Monthly Temperature and Rainfall of Typical Places in North America |
207 |
| 29. |
Average Monthly Temperature and Rainfall of Typical Places in the Old World |
208 |
| 30. |
Changes in Climate in California during the Christian Era |
237 |
| 31. |
Snow Crystals |
286 |