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BAIRD &TATLOCK (LONDON) LTD. 





Base. Horse-shoe form. 



1276-1281 

 MICROSCOPE BBH (BAUSCH & LOME'S). 



Pillar. Round ; provided with inclination joint, having vertical and horizontal stops. 



Arm. Handle type ; grooved at base for attachment of mechanical stage A ; provides ample space for manipu- 

 lation of object. 



Body Tube. Outside diameter, 35 mm. ; provided with society screw thread ; standard size eyepieces are used 

 (No. 1344) ; draw tube graduated in single millimetres with every tenth line numbered, adjustable in cloth-lined 

 sleeve, or in metal fitting, if SO specified, and provided with society screw thread for the use of low power objectives. 



Focussing Adjustment. Coarse adjustment by standard rack and pinion ; fine adjustment of our lever type with 

 double milled micrometer screw head for slow and rapid movement, the larger part graduated into 100 divisions, 

 each equal to .0025 mm. in vertical movement, and provided with a hinged indicator, which may be turned back 

 from the head. 



Stage. Of metal, covered with vulcanized rubber ; measures 120 by 107 mm., with a distance of 70 mm. from 

 its centre to base of arm ; provided with spring clips. 



Substage. Adjustable for focus by a quick-acting screw ; consists of a mounting for the Abbe condenser aad an 

 iris diaphragm, which comes into the plane of the stage when the screw is turned up as far as possible, allowing the 

 condenser to be used in immersion contact with the objective, if desired ; substage is swung to the left of the 

 optical axis when screw reaches the limit of motion downward. 



Special Swing-out Condenser. 



The last two prices above include an Abbe condenser in ordinary mounting. An Abbe condenser, 1.20 N.A., in 

 the new swing-out mounting with upper and lower iris diaphragms, will be substituted for the regular one at an 

 additional cost of 21/-. When ordering this mounting, please specify "screw substage with swing-out 

 condenser." 



CROSS STREET HATTCW GARDE1ST, E-C 



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