Geological and topographical maps, their interpretation and use, a handbook for the geologist and civil engineer . Sf*fl//VG _^,. Fig. 87.—Map from Prismatic Compass Field-book. 118 GEOLOGICAL AND TOPOGRAPHICAL MAPS this is undesirable, as it is then impossible to verifydoubtful observations. A specimen page of a field-book is given below, andthe plan plotted from this forms Fig. 87. Specimen Page of Fxeld-Book. Spring70 yards Camp14 2h 87 24 360 Camp 2f } 340 2i J 310 OL 23 2 Times(Hoursand Village ofVictoria. Bearings. Rates inMiles per Minutes). Hour. Hill 20°—1
Geological and topographical maps, their interpretation and use, a handbook for the geologist and civil engineer . Sf*fl//VG _^,. Fig. 87.—Map from Prismatic Compass Field-book. 118 GEOLOGICAL AND TOPOGRAPHICAL MAPS this is undesirable, as it is then impossible to verifydoubtful observations. A specimen page of a field-book is given below, andthe plan plotted from this forms Fig. 87. Specimen Page of Fxeld-Book. Spring70 yards Camp14 2h 87 24 360 Camp 2f } 340 2i J 310 OL 23 2 Times(Hoursand Village ofVictoria. Bearings. Rates inMiles per Minutes). Hour. Hill 20°—10 miles. Stream 10 yardswide with ford45°. In addition to the field-book it is of course importantto make notes of the chief geological features encountered,together with the general dip of the strata and theircharacter and fossil contents; but it must be borne inmind that detailed work cannot be attempted on a recon-naissance of this kind. The prismatic compass may also be used for roughsurveys of specific areas; but for this purpose the writerprefers the plane-table, the use of which will next bedescribed. The reade
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