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.224 Use of the Globes.

PR OB. VII. To find the Sun's Azl^for any Hour ofi the Day: j^ft

Every thing being done as in ^ ^Problem, the Arch of the Horizo* 1 ^t-aihed between the North Point anwhere the Quadrant of Altitudeis the Azimuth East or West as requm’ ^PR OB. VIII. To find the Time ^Sun rifies or sets:

Find the Sun’s Place for thebring it to the Meridian, and set the yeHand to XII. then turn the Globe 11 yeSun’s Place touches the East Part 0 ^ 0 {Horizon, the Index will shew the D° yits Rising: After that turn the & 0 p'the West Part of the Horizon, and t ^ ^dex will shew the Time of its Setti^cthe given Day. r rftj

PR OB, IX. To find the Length °Jgiven Day or Night:

This is easily known by taking get'ber of Hours between the Rising aI1 p a yiting of the Sun for the Length of t ^ l£ y o*and the Residue to 24, for the Lenl?the Night. ,

P R O B. X. To find the Hour offhaving the Sun’s Altitude given -Bring the Sun’s Place to the ^ e j# 11and set the Hour-Hand to XIL , ifi