Memoir of Thomas Drummond, R.E.,F.R.A.S., Under Secretary to the Lord Lieutenant of Ireland, 1835-1840 |
From inside the book
Page 47
... difficulties to be surmounted : the first of these regards the measure- ment of base - lines ; the second , the triangulation of the surface to be surveyed and measured . A base - line is an initial measured line , whose length is ...
... difficulties to be surmounted : the first of these regards the measure- ment of base - lines ; the second , the triangulation of the surface to be surveyed and measured . A base - line is an initial measured line , whose length is ...
Page 48
... difficulty in keeping it fully stretched , straight along its length , and wholly in the line ; and errors corresponding to this difficulty must be entailed on the measurement . The base being measured , the next set of operations ...
... difficulty in keeping it fully stretched , straight along its length , and wholly in the line ; and errors corresponding to this difficulty must be entailed on the measurement . The base being measured , the next set of operations ...
Page 54
... difficulty the farther northwards they were extended . They not only required great skill in scientific observations , but the employment of immense personal energy . Captain , afterwards Colonel Colby , had by this time been long ...
... difficulty the farther northwards they were extended . They not only required great skill in scientific observations , but the employment of immense personal energy . Captain , afterwards Colonel Colby , had by this time been long ...
Page 56
... difficulty Colby , accompanied by his assistants , Robe and Dawson , and a selected party of artillerymen , established themselves and instru- ments in camp on the top of Corrie Habbie , in Banff- shire , a hill about 2200 feet high ...
... difficulty Colby , accompanied by his assistants , Robe and Dawson , and a selected party of artillerymen , established themselves and instru- ments in camp on the top of Corrie Habbie , in Banff- shire , a hill about 2200 feet high ...
Page 57
... difficulties that were not absolutely insurmountable on foot . Sometimes a beaten road would fall in our course , offering the temptation of its superior facilities to the exhausted energies of the weary members of our party ; and in ...
... difficulties that were not absolutely insurmountable on foot . Sometimes a beaten road would fall in our course , offering the temptation of its superior facilities to the exhausted energies of the weary members of our party ; and in ...
Other editions - View all
Memoir of Thomas Drummond, R. E. , F. R. A. S. , Under Secretary to the Lord ... John Ferguson McLennan No preview available - 2020 |
Memoir of Thomas Drummond, R. E., F. R. A.S., Under Secretary to the Lord ... John F. M'lennan No preview available - 2016 |
Common terms and phrases
Administration apparatus appears appointed Argand Argand burner Argand lamp bars became Bill boroughs Captain Catholics chief Colby Colonel Commissioners common compensation considerable constables constabulary course crime Crown direction districts Drum Drummond light Dublin duties Edinburgh effect engaged England English Excellency experiments favour force Government heliostat honour House improvement inquiry interest Ireland Irish juries jurors justice labour land landlord Larcom letter light lighthouse lines Lord Althorp Lord John Russell Lord Lieutenant Lord Melbourne Lord Morpeth Lord Normanby Lough Foyle magistrates Maziere Brady measure ment mond Morpeth mother object observation occasion officers organisation outrages Parliament party passed persons police political population present principle proceedings question railways reflector regard Report respect result Ribandism Roden Committee says Secretary society Survey tanistry tenants Thomas Drummond tion Tipperary triangulation Trinity House whole Woolwich