. Essex naturalist: being the journal of the Essex Field Club. riments which fully confirmed his theories, and theresults of which are summed up by saying that all magnetic bodiesbehave toward the globe of the earth precisely as other magnetsbehave toward the terrella, the laws of their action being alike. Inthe following chapters further experiments with loadstones andneedles are described, relating chiefiy to the results of touching onewith the other. Amongst other matters which helped him to thisconclusion was his discovery that if a rod of iron is hammered whilstlying in a north-and-south
. Essex naturalist: being the journal of the Essex Field Club. riments which fully confirmed his theories, and theresults of which are summed up by saying that all magnetic bodiesbehave toward the globe of the earth precisely as other magnetsbehave toward the terrella, the laws of their action being alike. Inthe following chapters further experiments with loadstones andneedles are described, relating chiefiy to the results of touching onewith the other. Amongst other matters which helped him to thisconclusion was his discovery that if a rod of iron is hammered whilstlying in a north-and-south position it becomes magnetized by theinfluence of the earths magnetism. This observation is illustratedby a quaint woodcut, which is reproduced on a smaller scale inFig. 3- Books IV. and V. go into some geographical and astronomicalmatters ; being intended chiefly as a contribution to the nauticalapi)lications of his studies. He describes sundry instruments, oneof them, for ascertaining the variation of the compass in different ( 3. 59. Pkocess ok Magnetizing Ik(.in uv Hammering while it lies in a North-anu-South Position. Fig. 4.
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