meaning of this sysmbol

[Refiner232121]

http://shorinternational.com/TestGoldMakeSolution.htm


can someone tell me what is the meaning of this sysmbol

V V
Mix 10 grams potassium dichromate salts with the � oz. nitric acid plus � oz. distilled water.

Thank you

 

[Platdigger]

I would say it is just a typo. It ocurs at least 3 more times on that page.