| 41. | Variational principles are found among earlier ideas in surveying and optics.
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| 42. | He attended the York County Academy and was engaged in surveying.
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| 43. | He has returned to do some surveying after seven years away.
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| 44. | Weird maryland is a book surveying the entire state of maryland.
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| 45. | Remick also spent many summers in northern Qu�bec surveying the lands.
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| 46. | My Dad owns an old surveying transit . . we think.
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| 47. | Substantial advancements were made in the fields of cartography and surveying.
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| 48. | Wright began his career surveying the frontier areas of William Weston.
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| 49. | He explored a lot of places surveying the local plant life.
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| 50. | He is credited with teaching David Thompson the skills of surveying.
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