From the set " Human Physiology " origially produced in 1888, however, i believe this dates from a later set. See photo 3.
eBay
The slide consists of two glass plates, on that the image is applied to and a second to protect the image. The slide normally has a inner paper border and then the slide is then held together with edging paper.
eBay
eBay
Vintage Resistance Box, Philip Harris, Plug Key, Scientific Instrument Dated around 1920 - 50's Mahogany wooden case, with bakelite top. Manufactured by Philip Harris - Birmingham Ohms at 18c 1-10, 20-100 INF Good used condition for age, with some superficial wear and marks
eBay
This Newton Color Wheel is a unique collectible piece from the United States. Its origins and history add to its charm and make it a desirable item for enthusiasts.
eBay
L.S.T.M. ALBERT DOCK. In Liverpool. The box will hold a total capacity of 24 slides. Weight: 393 gram. The initial on the top. Dating from 1930s-50. The box open and close smmothly.
eBay
Powers on and I can here it vibrating The speed buttons work along with the lite The heater also works and gets very hot I’m selling this As-IS What you see is what I ship Tested
eBay
Aristo Elektro Slide Ruler Nr 815 E Made In Germany In Original Leather Pouch. Add special instructions?. We've tried our best to highlight any faults with a Red Arrow Sticker in the pictures. You'll see our reply there, too.
eBay