366 PHOTOGRAPHIC FACTS AND FORMULAS 
a == $0.682 85.2368 = 
4 = 67.576 113.6490 == 
5 = 84.470 142.0613 = 5 
6 = 101.364 170.4735 = 
7 = 118.258 198.8858 — 
8 = 135.152 227.2980 = 
9 = 153.046 255,7103 = 
COMPARISON OF THERMOMETER SCALES.—Equivalence of 
Centigrade (Celsius) and Fahrenheit Thermometers. 
Oenti- Fahren- Centi- Fahren- Centi- Fahren- 
grade heit grade heit grade heit 
0 32.0 35 95.0 70 158.0 
1 33.8 36 96.8 71 159.8 
2 35.6 37 98.6 72 161.6 
3 37.4 38 100.4 73 163.4 
4 39.2 39 102.2 74 165.2 
5 41.0 40 104.0 75 167.0 
6 42.8 41 105.8 76 168.8 
7 44.6 42 107.6 77 170.6 
8 46.4 43 109.4 78 172.4 
9 48.2 44 111.2 79 174.2 
10 50.0 45 113.0 80 176.0 
11 51.8 46 114.8 81 177.8 
12 53.6 47 116.6 82 179.6 
13 55.4 48 118.4 83 181.4 
14 5/2 49 120.2 84 183.2 
15 59.0 50 122.0 85 185.0 
16 60.8 51 123.8 86 186.8 
17 62.6 Be 125.6 87 188.6 
18 64.4 aS 127.4 88 190.4 
19 66.2 54 129.2 89 192.2 
20 68.0 55 131.0 90 194.0 
21 69.8 56 132.8 91 195.8 
22 71.6 57 134.6 92 197.6 
23 73.4 58 136.4 93 199.4 
24 75.2 59 138.2 94 201.2 
20 77.0 60 140.0 95 203.0 
26 78.8 61 141.8 96 204.8 
27 80.6 62 143.6 97 206.6 
28 82.4 63 145.4 98 208.4 
