Do not apply oil or grease to the rack or pinion 

 as this will act as a dirt catcher and wear out the teeth 

 at the points of contact. 



/;/ inclining the stand always grasp it by the arm 

 and never by the tube, as in the latter case it may 

 loosen the slide or tear off some of the parts. 



In using a screw driver grind its two large surfaces 

 so that they are parallel and not wedge-shaped, so it 

 will exactly fit in the slot of the screw-head. Turn the 

 screw with a slow steady motion pressing the screw- 

 driver firmly into the slot. No screw-head will ever 

 be injured if these points are observed. 



When repairs or alterations are necessary, always 

 have these made by the manufacturers who can, from 

 a system of duplicated parts, do it not only cheapest, 

 but best. 



Joint for Inclination. If the joint should 

 become loose so as to prevent the arm being set at 

 any angle of inclination, it should be tightened by 

 drawing up the nut at one or the other side. If the 

 nut has screw slot use a properly prepared screw 

 driver, but if two holes a suitable key should be 

 obtained from the maker. In high grade instruments 

 the axle is generally tapering, and to determine which 

 nut is to be drawn up can only be done by trial. 



'97 



