3S2 



Description of Instrument. 



Optical squares 

 Optical bench 

 Optometer, Tweedy's 



Pens, drawing - - - 



Pentagrapbs - 



Photo-niicrographic apparatus 



Physical apparatus, various - 



Plane-tables 



Planimeters 



Polariscopes 



Protractors, various - 



Pyrometers, various 



Pitch compound for cables, telegraph 



Rain gauges 



Range finders, various 



Relays 



Resistance coils 



Rulers, parallel, various 



Rules, boxwood 



Rules, flat, various 



Revolution indicator, Buss's 



Sand glasses 



Scales, various 



Sectors 



Set squares, various 



Sextants, various 



Slide rules, various 



Slopes and batters - 



Sounders, telegraph 



Speedometers 



Spectroscopes 



Spherometer 



Stadiometers 



Station pointers 



Standard yard measures 



Stencil plates 



Storm glass 



Straight edges 



Stop watches 



Stills 



Sundials - 



Switches, battery 



Serving tape for cables, telegraph 



Tachometer - 



Tapes, measuring, various 



Telemeters - 



£ s. 



d. 



6 6 







8 







G 7 



6 



29 16 







292 10 







35 3 







1,714 10 







128 







372 19 



6 



3 5 







496" 4 







29 16 







5G0 13 







113 13 



6 



519 5 







275 7 







53 10 







615 4 



6 



37 13 







438 15 



4 



21 







30 







793 2 



6 



3 7 







93 5 



7 



105 10 







1G 11 







2 o 







211 1 







8 12 



6 



52 11 







8 18 



6 



97 7 



6 



07 10 







45 







24 7 



10 



G 







17G IS 







36 







58 9 







46 







2 3 







3,088 10 







31 10 







1,550 15 



3 



14 17 







