Accessories For Optical Benches-Object Needle, Mounted

The Following Accessories Are Available Optiolly For Use With Optical Benches As Per Cat. Nos. 1110920 Are Provided With Metal Support Rods For Their Vertical Mounting In The Riders. The Sizes Of The Components And Lengths Of The Respective Mounting Rods Have Been Designed To Provide A Common Optical Center. (Object Needle, Mounted Pointed Needle From A Steel Rod, For Use As An Object In Lens And Mirror Experiments.)