Memoir of Thomas Drummond, R.E.,F.R.A.S., Under Secretary to the Lord Lieutenant of Ireland, 1835-1840 |
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Page vi
... COMPENSATION MEASURING BARS - THE COMPENSA- TION MICROSCOPES - THE INVENTION OF THE BARS - MEASURE- MENT OF THE BASE AT LOUGH FOYLE , ยท CHAPTER IX . 79-112 THE ORDNANCE SURVEY - MR DRUMMOND'S HEALTH - THE DRUM- MOND LIGHT , AND ...
... COMPENSATION MEASURING BARS - THE COMPENSA- TION MICROSCOPES - THE INVENTION OF THE BARS - MEASURE- MENT OF THE BASE AT LOUGH FOYLE , ยท CHAPTER IX . 79-112 THE ORDNANCE SURVEY - MR DRUMMOND'S HEALTH - THE DRUM- MOND LIGHT , AND ...
Page 85
... compensation pendulums , consisting of two bars , one of brass and the other of steel , fastened together by screws , with an arrangement of levers to raise or let down the pendulum bobs . In these the compensation was effected at the ...
... compensation pendulums , consisting of two bars , one of brass and the other of steel , fastened together by screws , with an arrangement of levers to raise or let down the pendulum bobs . In these the compensation was effected at the ...
Page 86
... compensation at the ex- tremities of the Colby - Drummond bars was exceed- ingly ingenious . But , before describing it , let us see how it was possible that the compensation could be effected . If two bars of different metals be ...
... compensation at the ex- tremities of the Colby - Drummond bars was exceed- ingly ingenious . But , before describing it , let us see how it was possible that the compensation could be effected . If two bars of different metals be ...
Page 87
... compensated points . These are always at the same distance from one another , viz . , the length of the bars when equal . This length was 10 feet 1.5 inch . The bars were composed , the one of brass , and the other of iron ; THE ...
... compensated points . These are always at the same distance from one another , viz . , the length of the bars when equal . This length was 10 feet 1.5 inch . The bars were composed , the one of brass , and the other of iron ; THE ...
Page 88
... compensation microscopes which were used along with them , are fully described by Captain Yolland in his " Account of the Measurement of the Base of Lough Foyle . " There were in all six sets of compensation bars formed , and seven ...
... compensation microscopes which were used along with them , are fully described by Captain Yolland in his " Account of the Measurement of the Base of Lough Foyle . " There were in all six sets of compensation bars formed , and seven ...
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Memoir of Thomas Drummond, R. E. , F. R. A. S. , Under Secretary to the Lord ... John Ferguson McLennan No preview available - 2020 |
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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