SCIENCE— ADVERTISEMENTS 



Kewaunee Automatic Take-up 

 For Table Tops 



The illustration above shows the new Kewaunee Automatic Take-up for 

 Table Tops, or reciprocating spring bolt construction, which was invented by 

 Mr. C. G. Campbell. 



For these tops we use two-inch clear birch strips which have been thoroughly 

 cured and dried. The strips are matched with a "V" joint and glued solidly 

 together under enormous pressure, then dressed to one and five-eighths inches 

 in thickness. '' jf f ^ , 



To secure greater service, we insert a steel rod in the top, as indicated in the 

 picture, at each end of which is placed a washer, then a heavy compress spring, 

 another washer and a nut. 



The springs are gauged to resist in equal measure, the expansive force of 

 birch. If the top should swell slightly, the springs instantly retard that action 

 with heavy pressure, yet do not crush the joints or break the glue like the plain 

 bolt. When the wood shrinks back to normal, the springs reciprocate and assist 

 the action, taking almost all the strain off the glued joints. 



If you are interested in the best Laboratory Furniture, you will want to see 

 a copy of the Kewaunee Book. Ask for one. 



LABORATORy FURNITURE ^^EX'FERT.S 



New York Office ^^5 Lincoln Street 70 Fifth Avenue 

 KEWAOriEE.WIS. 



BRANCH OFFICES: «^ 



Chicago Atlanta Dallas iKansas City^^E'Spokane 



Columbus Alexandrxa, La. El Paso Minneapolis SanJFrancisco 



Little Rock Denver, 



