68 REPORT OF tHE No. 3 



Appendix 23. 



Extract from report and field notes of the Survey of Seventh Base Line west 

 from Boundary between Kenora and Thunder Bay, Districts Kenora and 

 Patricia, Phillips & Benner, O.L.S., 1927. 



The line was run west in six-mile chords to the parallel of latitude at 50 

 degrees 24 minutes north. It was cut out of sufificient width as to give a sky 

 line throughout its entire length. This entailed a great amount of labour as 

 the line for a great portion of its length passed through a dense forest ranging 

 upward of 100 years in age. Frequent observations were taken and these will be 

 found recorded in the notes. A six-inch transit was used, the telescope of which 

 was of sufficient power that observations could be m.ade on Polaris at any time 

 of day when weather conditions were favourable. 



A leveller and rodman were attached to the party by the Topographical 

 Surveys Branch and the line was levelled and check-levelled by these men. The 

 results of their work was filed at Ottawa. 



The line was chained twice, first with a tape graduated in chains and links 

 and then with one graduated in feet and tenths. In only a few cases was it 

 necessary to repeat the measurements in order that the closing error would not 

 be greater than two feet. We had each chainer use a clinometer and are certain 

 that their work was well and carefully performed. The country through which 

 the line passed was not particularly rough. 



Iron posts of standard pattern were planted at the points indicated in your 

 instructions or near to those points as possible. It was necessary to witness a 

 considerable number of the posts. In addition to these iron posts, several short 

 iron posts or rock posts were set on prominent hills. It was not always possible 

 to get these in at an even chainage, but the correct chainage was stamped upon 

 the post and the positions of these will be found indicated in the notes. Cairns 

 of rocks were built up around the wooden posts planted at the end of each mile. 

 Your instructions stated that each wooden post should have a cairn, but in a few 

 cases we could not get rock save from a great distance. Might we suggest, that 

 an such cases as this, that the surveyor in future be allowed to have pits dug and 

 mounds erected in lieu of the cairn. 



Magnetic observations were taken and these were recorded in the books 

 provided by your Department and have already been returned to you. 



Topography 



The relief of the country through which the line passes is not at all rugged 

 and in a few instances were the hills more than seventy-five feet in height. The 

 results of the leveller's operations will give you a better view of this feature than 

 we can. 



Lac Seul was the most important topographical feature along the line and 

 we were able to use this to great advantage for the transportation of our equip- 

 ment and supplies. The level of the lake was about seven feet above normal in 

 the early part of the summer and this flooding carried far up the rivers — especial 

 the Vermilion. 



The provisional sheets published by the Topographical Surveys Branch 

 fom their aerial photographs were found to be very accurate. The base line 

 was plotted on these before going into the field and our line followed very close 

 to its position as shown by the plotting. In only one instance did we notice any 

 error in the plans and this was in the 52nd mile. The map here showed a small 



