10. What is the difference of latitude between Cape Ortegal in Spain, and New Madrid, a town in Missouri, on the Mississippi, 70 miles below the mouth of the Ohio ?

11. What is the difference of latitude between Boston and Buenos Ayres?

12. How do we find the difference in longitude between two places, when both have either east or west longitude, also, when one has east and the other west longitude ?

13. What is the difference in longitude between Augusta, a city in the state of Georgia, and the mouth of Columbia river ?

14. What is the difference in longitude between Raleigh, the capital of North Carolina; and Florence, the capital of the grand Duchy of Tuscany, and one of the finest cities of Italy, or perhaps in Europe?

15. How do we find the shortest distance between any two places on the globe?

16. What is the nearest distance between Damascus, a city of Syria, in Asiatic Turkey; and Mocha, an extensive city of Yemen, in Arabia, and the principal port on the Red Sea ?

17. How do we find all those places that are at the same distance from a particular place as any other given place?

18. Required all those places that are at the same distance from London as Milan, the capital of Austrian Italy.

19. How do we find that place on the globe, the latitude of which is given, and its distance from a particular place?

20. A place in latitude 50° N., and situated in east longitude, is 2700 geographical miles from Medina, a town in Africa, and capital of the kingdom of Woolly, situated a few miles north of the Gambia, about 400 miles from its mouth: required the place.

21. How do we find that place, the longitude of which is given, and its distance from a particular place?

22. A celebrated island in the Mediterranean, and in longitude 27° 32′ E., is 5114 English miles from New-York; what is that island called?

23. How do you illustrate the circumstances of the antæci?

24. Which are the antœci of the inhabitants of Porto Rico, an island in the West Indies, belonging to Spain?

25. How do you illustrate the circumstances of the periæci?

26. Which are the pericæci of the inhabitants of Barbadoes, one of the Caribbees, and the most eastern of the West India islands?

27. How do you illustrate the different circumstances arising to the inhabitants who are antipodes to each other?

28. Which inhabitants of the earth are the antipodes of Paraiba, the capital of a province of the same name, in Brazil?

29. How do we find the antæci, periæci, and antipodes of any particular place?

30. Required the antœci, periœci, and antipodes of Bencoolen.

31. How do you find the angle of position between places on the horizon of the globe?

32. What is the angle of position between NewYork and St. Antonio, the most northerly of the Cape de Verd Islands ?

33. How do we find the bearings of places to each other name the different methods.

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34. What is the bearing between. Friendly Islands and Navigation Islands, both in the south Pacific Ocean?

35. How do you find the number of miles contained in a degree of longitude on any given parallel of latitude?

36. How many geographical and American miles make a degree of longitude in the latitude of Quebec?

37. How do you find at what rate per hour the inhabitants of any given place are carried from west to east, by the earth's rotation on its axis.

38. At what rate per hour are the inhabitants of Cayenne, capital of French Guiana, carried from west to east by the revolution of the earth on its axis?

39. How do we find by the globe, the hour of the day at different places at the same instant ?

40. When it is six o'clock in the morning at Lima, what o'clock is it at the following places: Pernambuco, capital of the province of the same name in Brazil; Sierra Leone in Africa; Dublin, Madrid, London, Palermo, Mocha a city in Arabia, and Canton in China?

41. How do you find those places where it is noon, or any other given hour, when the hour at any particular place is given ?

42. What places have noon, when it is seven o'clock in the morning at Philadelphia ?

43. How do you find the sun's place in the ecliptic, and his declination, on a given day?

44. What is the sun's longitude and his declina

tion, on the 23d of September?

45. How do we find what latitude the sun will be vertical to, on a given day?

46. Find all those places of the earth to which the sun will be vertical on the 20th of May.

47 How do you find those two days of the year on which the sun will be vertical to any given place in the torrid zone?

48. On what two days of the year will the sun be vertical to Bayamo, a town on the south coast of Cuba?

49. How do you find where the sun is vertical, the day and hour at any particular place being given?

50. On what two days of the year is the sun vertical at St. Christopher's island, in the West Indies?

51. How do you rectify the globe to the sun's declination, on a given day?

52. Rectify the globe to the sun's declination on the 1st of November. Name the circumstances. 53. How do you illustrate by the globe, the variety in the length of the days and nights, and the change of seasons?

54. Required to show the comparative length of the day and night in all places on the earth, on the 4th of July; and also, to illustrate how the regular succession of day and night, and the change of seasons, are really caused by the diurnal and annual motions of the earth.

55. How do you rectify the globe for the latitude of a given place, and for the sun's place on a given day?

56. It is required to rectify the globe for the latitude of Washington City, and for the sun's place on the 21st of June.

57. How do you illustrate by the globe, the comparative length of the days and nights, in any particular place, at all times of the year?

58. It is required to show at one view the comparative length of the days and nights, at the tropic of Cancer, at all times of the year. Name the cir

cumstances.

59. How do you find the rising and setting of the sun, and the length of the day and night at any place in the torrid or temperate zones?

60. What time does the sun rise and set at Moscow on the 22d of December?

61. How do you find the sun's declination and day of the month, the length of the day, at any particular place being given ?

62. On what two days of the year does the sun rise at 4 o'clock at Archangel?

63. How do you find those places in the torrid or temperate zones, when the longest day is of any given length, less than twenty-four hours?

64. In what latitude north is the longest day 16 hours? Name the most remarkable places.

65. Given the day of the month, at any particular place, not in the frigid zones, how do you find what other day is of the same length?

66. What day of the year is of the same length as the 20th of March?

67. How do you find the beginning, end, and duration of constant day and constant night at any place in the frigid zones ?

68. What is the length of the longest day and longest night at the mouth of the Lena, a river in Asiatic Russia, which rises in the mountains northwest of lake Baikal, and falls into the Frozen Ocean in latitude 73 north, after a course of nearly 2000 miles?

69. How do you find the number of days that the sun will rise and set alternately every twenty-four hours, at any place in the north or south frigid zones?