... of the &ations were provided withtimber platforms quiteindependent of the pillar itself. These enabled the instrument party to stand at a convenient height with regard to the instrument, and they also served as a framework for acanvas wind-screen. The latter, on occasion, wasused as a sunshade, being lashed...

...A H SMYTH SIGNALLING BLOCKS WORKING RAILWAYS SIGNALS INSTRUMENTS ELECTRIC STATIONS DOUBLE LINES INTERLOCKING SYSTEMS JUNCTIONS AUTOMATIC POWER PROTECTION LEVEL CROSSINGS ORGANISATION MANUFACTURE STANDARDISATION APPLIANCES DEPARTMENTS INDIA ASIA SELECTED...

...A H DOUGLAS © Thomas Telford and ICE 1927 GENERALISED METHODS TRAVERSES SURVEYS RAILWAYS FLYING SURVEYING AERIAL RECONNAISSANCE ANEROID LEVELLING PLANE TABLES INSTRUMENTS ACCURACY INSTRUMENTATION ERRORS Cbe 3nstttution of (Ctofl Engineers, SELECTED ENGINEERING PAPERS...

...S BLENCOWE © Thomas Telford and ICE 1925 SIMPLIFIED TACHEOMETRY SCALE MEASUREMENT VERTICAL ANGLES METHODS CALCULATIONS TACHEOMETERS INSTRUMENTS INSTRUMENTATION SELECTED ENGINEERING PAPERS. BEINGORIGINAL COMMUNICATIONOSRDERED BP THB COUNCIL TO BE PUBLISIIED WITHOUT DISCUSSION...

...A E GRIFFIN SUDAN AFRICA © Thomas Telford and ICE 1924 LEVELLING SWAMPS RIVERS WATER IRRIGATION SURVEYING BANKS INSTRUMENTS INSTRUMENTATION SUDD REGION WHITE NILE BAHR EL JEBEL SIiiLECTED ENGINEERING PAPEKS. BEINOGliIGINACOL MhfUNICATIOONRS DERED BY TIIE COUNCIL...