No 54389. 



Theodolites. Microscopes. 



533 



54 387. 1 = 5. 



54 388. 1 : 3. 



54,387. Repeating Theodolite, Figure, with drop-screw, for distance measurements; 

 telescope arranged for tunneling and canting back, with steel axes, rotary magnifiers; 

 Horizontal Circle concealed by glass, and silver limb; Striding Level, round pattern Level 

 on vernier circle; horizontal circle 140 mm diameter divided in l / 3 , verniers giving 20"; 

 altitudinal circle 120 mm diameter in Vs * on silver, concealed, with verniers inserted 

 giving 30", with alidade level and micrometer screw; telescope 250 mm focal length, 

 power 25; with carrying case, shoulder straps and spherical stand 



The telescope has an orthoscopic ocular and a range of 7 km; it is provided with clamp and fine 

 adjustment, being arranged for measuring distances. 



Extra Prices: (a) for levelling bubble on telescope 1. 7. 

 (b) Transit Level 1. 14. 0. 



Particulars and prices of Larger Theodolites on application. 



Microscopes. 



54.388. Large Microscope, Stand I, Figure, with socket for tilting down; round, rotary 

 and centering stage, coarse and fine tube focussing, millimetre graduation on draw tube; 

 large illuminating device, after Abbe; Abbe Indicating Apparatus; optical outfit for 

 14 1400 diameters, and case 



.The coarse tube focussing is by rack and pinion, the fine by worm and worm wheel; a complete 

 turn of the worm corresponds to raising or lowering the tube by 0.1 mm. The optical outfit consists 

 of 1 micrometer ocular, 4 Huyghenian oculars, 3 achromatic objectives, 1 homogeneous oil-immersion 

 objective and triple nose-piece. 



54.389. - - idem, with fixed stage, simple illuminating apparatus and simple optical equip- 

 ment, for 20 1400 diameters, without indicating apparatus 



s. d. 



35.0.0 



30. 0. 



24.0.0 



For Model Microscopes: see previous section. 



Cl. 1530, 5936. 



