Magnetical InvestigationsPublished between 1839 and 1852, this two-volume work records the contribution of William Scoresby (1789-1857) to magnetic science, a field he considered one of 'grandeur'. The result of laborious investigations into magnetism and (with James Prescott Joule) electromagnetism, Scoresby's work was particularly concerned with improving the accuracy of ships' compasses. A whaler, scientist and clergyman, he epitomised the contribution which could be made to exploration and science by provincial merchant mariners - men often less celebrated than their counterparts in the Royal Navy or in metropolitan learned societies. In addition to his pioneering work on magnetic science, Scoresby furthered knowledge of Arctic meteorology, oceanography and geography. Volume 1 considers the magnetism of steel and suggests ways to determine its quality and hardness. |
Contents
PART | 1 |
DESCRIPTION OF READY AND EFFECTIVE PROCESSES | 10 |
THE READY DETERMINATION OF THE PROPORTIONAL | 17 |
CHAPTER V | 47 |
CHAPTER VI | 65 |
CHAPTER VII | 74 |
CHAPTER | 88 |
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Common terms and phrases
abscisses advantage annealing Average Weight bars or plates betwixt blister steel Bradford iron breadth busks capacity for magnetism cast iron chapter compared comparison compass needles compound magnets considerable corresponding curves degree of hardness deterioration determined deviating power diagram dimensions directive power distance effect employed exhibited experiments extent find five grains hard bars hard plates hardened heat horse-shoe inch plates inches in length influence investigations linseed oil magnetic capacity magnetic condition magnetic energy magnetical powers magnetical properties magnetised mass mean deviation mean power measure method of deviations obtained pairs pig metal plates or bars poles Power in Combination powers of magnets proportional powers quality of steel ratio reduced respective separately set of bars shear steel shew shewn similar single bars six plates straight-bar Table tangent temperature tenaciousness terrestrial magnetism test-bar testing thickness thin plates tion torsion trial twelve inches various verification whilst WILLIAM SCORESBY