Bausch & Lomb Optical Company- Adjustable Slit An adjustable slit is an indispensable attachment in spectrum experiments with light. We furnish the adjustable slit mounted on a blackened metal front board, … whenever this slit is used. Prisms Prism Support This is a convenience in experiments with light, affording a support for the different prisms, etc. It has a regular standard with base block and clamp, which attaches directly to the optical bed and may be placed in any convenient position along it.…
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-450-220.webp)
