Image from the Biodiversity Heritage Library.
Contributed by American Museum of Natural History Library.
| www.biodiversitylibrary.org
Transcription
To convert time into long.
Multiply hours by 15 to get degrees. Divide the minutes by 4, and add the quotient to the number of degrees. Minutes left-over multiply by 15. Divide seconds by 4, and add the quotient to the minutes. Finally multiply the remaining seconds by 15.
4 hrs., 29 min., 38 sec.
4)
60
7
67°
4)29 (7
28
1 x 15 = 15'
9
24'
4)38 (9
36
2 x 15 = 30'
Ans 67° 24' 30"