Careful with the Baader fluid Carl !

[John]

I came across this wonderful image of Alvan Clark and Carl Lundin with the Yerkes refractor 40 inch objective lens. Nobody trying to lick it I notice 😄

 

Edited March 29 by John

[JeremyS]

1 hour ago, John said:

Nobody trying to lick it I notice 😄

 

I wouldn’t be too sure about that John. Looks like Lundin is wiping off the evidence with his hankie.

I hope it’s a clean one 🤔

[Telescope40]

“You’re gonna need a bigger tub of fluid !!”

😂😂😂. John 

[Louis D]

Was he using a fresh microfiber cloth being careful to roll it upward while wiping to lift grunge away without dragging it across the surface?