Maps and map-making; three lectures delivered under the auspices of the Royal geographical society (1910)
Reeves, Edward Ayearst, 1862-1945, Royal Geographical Society (Great Britain) · London, The Royal geographical society · leaf 47
ss from one division on the arc to thenext at one turn of the drum or head of the micrometerscrew. This drum is divided into five or ten seconds, sothat when the space on the arc is ten minutes, it is possible toread by the micrometer to one or two seconds. The draw-back to ordinary micrometer… … Fig. 34.—Reeves Tangent Micrometer. soon get out of adjustment. A new form of micrometer,certainly more compact and suitable for travellers who haveto consider weight and bulk, is the Tangent Micrometer(Fig. 34). This I designed a few years ago, and it is nowdoing good work. A small 4-inch transit…
Cartography · Surveying
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